The story

43businesses started since high school

Forty-three businesses. this one stuck.

Since high school I've started forty-three businesses. Thirty-seven were massive failures. Four did okay. One was a handyman company, and I can barely fix things myself. This is the story of number forty-three, and why it took the first forty-two to build it.

Chapter 01·2015

The Bay Street plan

I studied finance because I was obsessed, like everyone around me, with investment banking. Not Wall Street. In Canada it's called Bay Street. I never actually set foot there, and missing that dream turned out to be the luckiest break of my life.

The moment the obsession cracked was a third-year corporate finance exam. I was at a coffee shop grinding through the material when a thought landed that I couldn't shake: there is no way on earth that ten years from now, someone is going to be memorizing this formula to run this calculation by hand. It's impossible. There must be a better way.

So instead of studying, I started buying books about artificial intelligence. I finished the degree out of pure stubbornness, and when I graduated I went into management consulting, not banking. Close enough to the plan to look right, far enough from it that the itch never went away.

A young Mark at an office desk at dusk, studying dashboards on two monitors
The consulting years. A reenactment of a thousand late nights that all looked like this.

Chapter 02·2017

One book, then fifty

The book that did the damage was Thinking Machines by Luke Dormehl. I was supposed to be studying corporate finance. Instead I was reading about founders using machine learning on real problems, and I hit a concept I'd never heard of: affective computing. Teaching machines to read human emotion.

That's where I found Rana el Kaliouby. Her company, Affectiva, came out of the MIT Media Lab and used computer vision to recognize emotion in faces. The use that stopped me cold was helping people with autism understand what the faces around them are feeling. I got so distracted from the exam I was supposed to be studying for that I went down the full rabbit hole of her story, and for the first time I started picturing what it would look like for me to break into AI and help people too.

One book became five, then ten, then fifty. And for the next two years I went back to that same coffee shop, almost every day, with a notebook, teaching myself to write Python from absolute zero. Nobody photographs you becoming obsessed. It just happens, one flat white at a time.

Mark reading late at night in a university library, warm lamp light
The library years. A reenactment, since nobody photographs you becoming obsessed.

Chapter 03·2019

The room I talked my way into

Here's what breaking into AI actually looked like from where I stood: I was the finance guy. The business guy. The industry was walled off by physicists and PhDs, and every door I knocked on wanted credentials I didn't have.

So when I found out Rana el Kaliouby was holding a networking event, I went, with exactly one goal. I worked the room until I got my back-and-forth with her, and I told her the truth: she was one of my inspirations. She gave me advice I still carry, which was simply to keep pushing forward.

November 18, 2019. I kept the photo. Two years earlier she was a name in a book I read instead of studying. Now she was telling me to keep going. That was the whole meeting, and it was enough.

Mark with Rana el Kaliouby, CEO of Affectiva, at a networking event
November 18, 2019, with Rana el Kaliouby. Real photo, restored with AI. The moment is untouched.

Chapter 04·2020

The degree with no ceremony

I did the Master of Management in Artificial Intelligence at Smith School of Business at Queen's, specializing in natural language processing, as one of the youngest in the class. I paid an unbelievable amount of money to learn from some of the best in the industry, back when you couldn't get that knowledge anywhere else. Would I do it today with YouTube existing? Probably not. Did it change everything? Yes.

It was the COVID year. No ceremony, no gown, no photo of the moment. So I made the photo that should exist: same degree, same campus, same pride, rendered from my own likeness.

What the diploma didn't get me was a job. It took about eighty interviews to land my first data science role, and I kept losing to physicists. Over and over. I was still the finance guy in a room full of PhDs. Eighty rejections is a lot of chances to quit, and I logged every single one as data instead.

Mark in a graduation gown holding his MMAI diploma in front of Queen's University limestone
The graduation photo COVID cancelled. A reenactment, because the degree is real even if the ceremony never happened.

Chapter 05·2020-2022

Three jobs at once

By day I was a data scientist, then lead data scientist, at RVezy. Think Airbnb, but for RVs and motorhomes. I built the models that told the business what a customer was really worth.

At night I taught. Professor at the University of Ottawa for Introduction to Data Science and Analytics for Decision Making, plus bootcamps at Lighthouse Labs that walked a hundred-plus career changers into data jobs. Then Amazon came calling and I became a business intelligence engineer there.

That sounds like enough. It wasn't, because the whole time there was always a business number something running on the side.

Mark holding a laptop in front of a row of RV motorhomes at golden hour
The RVezy years. A reenactment. The motorhomes were real, the laptop never closed.

Chapter 06·Since high school

Forty-two attempts

To get to forty-three businesses you basically need an allergy to working for people. A visceral one. I had the allergy and the business mind, but no idea what the right vehicle was, so I tried everything. Shopify clothing brands, and I don't care about clothing. Dropshipping. Selling widgets. Dashboards as a service, where I'd build small businesses their Tableau and Power BI reports for next to nothing.

The last one before this was a handyman business. I can barely fix things myself. But I'd met some newcomers to Canada working on porches who needed steady legit work, so I put them on payroll, bought the branded t-shirts, ran the ads, the whole thing. It made money. They all made a little money. What none of them had was the trifecta I kept chasing: something I'm passionate about, something I'm actually good at, and something I have real authority in.

I call what happened next the Slumdog Millionaire strategy. In the movie, every brutal chapter of the kid's life turns out to be the answer to one question. That's what forty-two businesses were. I'll be on a sales call today and close it with a line I learned from a door slammed in my face during failure number thirteen. Nothing was wasted. It just wasn't assembled yet.

A dark desk scattered with the artifacts of many small businesses: a folded sweatshirt with a price tag, a shipping box, hand tools, a laptop showing dashboards, business cards and sticky notes
The graveyard of forty-two businesses. Rendered, not photographed, but every object here was a real bet I made.

Chapter 07·December 2022

The night it dropped

I was coming home from work at Amazon when I saw that ChatGPT had launched. I started playing with it, and within minutes I had a flashback: a few years earlier I had strapped two laptops together and spent days training a recurrent neural network on a corpus of Shakespeare. Days of work, to get it to generate one proper sentence, with the right prompting, once.

So when this thing wrote clean paragraphs on command, I didn't need a hot take. I knew from my own hands how hard the thing it was doing actually was. Someone had cracked it.

Days later I posted business number forty-three: a prompt engineering gig on Fiverr, one of the first five generative-AI gigs on the entire platform. I'd tried Fiverr before with the dashboards and it never took off, so this was me giving the same table one more bet. The result? Zero traction for the first month. Nobody knew what a prompt engineer was, including, mostly, me.

Mark grinning at glowing monitors in a dark home office, late 2022
The night ChatGPT dropped. A reenactment of exactly how it felt.

Chapter 08·2023

The ten-dollar era

Then people started hearing about ChatGPT, and the gig woke up. What that actually meant: I was selling prompts for ten dollars. I'd put four or five hours into a ten-dollar order, then spend more hours in disputes with buyers trying to shake free work out of me. I lived in fear of the review bar, protecting a perfect five stars from people who were not always fair. Hours away from my family, for almost nothing. Soul-crushing is the honest word.

The tools didn't help. This was the davinci era: four-thousand-token context windows, no memory, nothing agentic. Everything anyone called an AI app was a chatbot in a trench coat, and I Frankensteined every single one together by hand.

Month four, I closed my first ten-thousand-dollar deal and told everyone I knew. Then I went shopping for developers to build it, and they politely explained the thing I'd sold cost twenty thousand to build. I spent six weeks begging for help before refunding the client. I felt like a failure and a sham. But the lesson I hung my hat on was this: somebody had decided, in less than a day, that my idea was worth ten grand. The market was real. My order of operations was wrong. Fix the order, keep the market.

By the end of that run the gig ranked number one in the world for the keyword prompt engineer, pulling fifty to a hundred thousand impressions a month. The ten-dollar era had bought me the thing no shortcut sells: reps.

To make sure there would never be a business number forty-four, I did something a little unhinged. I ordered a sweater that said 43rd time's the charm in every color, and I started filming myself on YouTube wearing it, low quality and all. Putting it on the internet was the whole point. If the world could watch me try, I had no quiet way to quit. This one had to work, so I gave myself no other choice. I still wear the sweater.

A white sweater that reads '43rd time's the charm', hanging
Drag to spin
Mark on his YouTube channel wearing a sweater that reads '43rd time's the charm'
First the sweater, then me still wearing it on the channel. Real frame, no reenactment needed. The commitment device that left no exit.

Chapter 09·2023

The interview that got noticed

Fiverr had already featured me in their PR for what the gig was earning. Then Liam Ottley put me on his channel while we were both in Dubai, and that conversation cracked my thinking open about how big this could actually get.

The video went out with a title I couldn't have written better myself: forty-two failures, fifty-seven thousand dollars, the whole arc. That's the one that got noticed. A guy named Taha El-Harti watched it and decided to drive down and meet me. I didn't know any of that yet.

2023. The interview on Liam Ottley's channel that Taha saw before he ever reached out.

Chapter 10·October 25, 2023

The podcast that became a partnership

Taha El-Harti had seen that video, and he drove down to meet me because of it. But the interview that mattered most, I didn't know mattered yet.

He had a brand-new podcast and I was episode one. First time we ever met. Somewhere in that conversation he gave me one piece of advice: start the YouTube channel. Stop waiting. I listened.

That channel is how most people reading this found me. And Taha didn't stay the guy who interviewed me once. He became my business partner. We built the Early AI-dopters community together, and two years after episode one we were standing on a stage in Berlin at our own sold-out event. Some podcasts are content. That one was a hinge.

October 25, 2023. Episode one of Taha's podcast, and the first conversation of a partnership.

Chapter 11·2024-2025

Two lives at full speed

By day I was the data science manager at a pharma AI startup, putting machine learning and generative AI to work inside the drug industry. That world does not move fast and break things. Everything I shipped got picked apart in a compliance review first, because a confident wrong answer there is not a bug you patch on Monday, it is a real problem with real people downstream. By night and every weekend, Prompt Advisers: client projects, the channel, O'Reilly live courses, the community.

Forty hours in the day job. Forty more outside it. Every weeknight, every weekend, for a long time. I wasn't burning out exactly, but I was living two full lives at full speed, and the math only had one ending. At the end of 2025 I made the leap and went all in on the thing I'd been building since the ten-dollar days.

Mark presenting charts on a wall screen to a small team in a bright boardroom
The pharma years. A reenactment. The compliance reviews were extremely real.

Chapter 12·2025

Built in public

The YouTube channel Taha told me to start sits at 82k subscribers as you read this. Early AI-dopters grew to 1,300 practitioners with twelve coaches. And we threw our own sold-out event in Berlin, where I gave the keynote. The photos on this site are from those two days.

Remember the trifecta I chased through forty-two businesses? Passion, competency, authority. This is what it looks like when all three finally show up in the same place.

Mark presenting on stage at the Early AI-dopters Berlin event, with Taha El-Harti standing stage right
Berlin, 2026. Real photo. Me on stage with Taha, two years after episode one.

Chapter 13·2026

Full circle

Within a year of going full-time, Prompt Advisers crossed seven figures and Entrepreneur wrote the profile. More than two hundred AI projects delivered, five O'Reilly live courses taught, and a book of my own on the way: Thinking in AI.

It started with a book called Thinking Machines, read in a coffee shop by a finance student who should have been studying. It comes full circle with one called Thinking in AI. Forty-three businesses to learn one lesson: stack your failures like they're going to be on the exam, because one day, all at once, they are.

Mark seated on a desk edge holding a plain plum hardcover book in a warm study
Thinking in AI, before it has a cover. A reenactment of a book that is very much real.

Chapter forty-four is weekly.

The rest of the story publishes as it happens, on the channel and inside the community.