Edgar Castillo’s phone used to ring constantly. Clients calling mid-inspection to ask about moisture readings, foundation cracks, and what a certain stain on the ceiling actually meant.
He’d answer when he could, explain what he could, and still feel like he hadn’t quite said enough. Today, those same clients type their questions into a custom GPT he built himself.
“My clients have commented that the information they get is probably more beneficial than talking to me directly,” he says, “because they can actually see illustrations and step-by-step guides.”
But that’s not the only thing that changed. Edgar also published his first book.
He’s a home inspector and real estate assessor based in Edmonton, Canada. And 12 months ago, both of those sentences would have sounded like someone else’s life.
The home inspector who trusted the Universe to sign up
Edgar has worked in real estate assessment long enough to know that his industry moves slowly. New tools take years to catch on.
Most inspectors still rely on the same workflow they’ve used for a decade. Edgar, though? He’s not most inspectors.
Why? Well, for starters, he’s been a Mindvalley member for several years and has completed multiple programs. He keeps an eye on what’s coming, reads widely, and pays attention to what successful businesses are doing differently. And when AI started showing up in every conversation about business growth, he noticed.
“I saw where things were heading,” he recalls. He believed learning AI could help him stay ahead in an industry that traditionally moves slowly when it comes to technology.
He heard about Mindvalley’s AI Mastery through one of Vishen’s emails. And he was interested the first time it was offered, but didn’t enroll.
By the second cohort, he wanted in, but the money wasn’t there. As fate would have it, Edgar had recently completed Regan Hillyer’s The Art of Manifesting program, and he decided to put what he’d learned to the test.
“At first, I didn’t really think that anything was going to happen as the deadline for signing up was fast approaching,” he admits. He stuck with it anyway. At the last hour before the deadline, he got what he needed.
The technology gap that was costing him hours every week
The problem wasn’t that Edgar was bad at his job. Rather, the problem was that being good at his job required him to be available constantly.
Every client had questions. Every inspection report raised more. And he was the only one who could answer them. That meant his expertise sat locked inside his head, accessible only when he picked up the phone.
He’d thought about ways to communicate more clearly, to get information to clients faster without the back-and-forth. Nothing had solved it cleanly. The personal touch that his business was built on felt like it was in tension with the efficiency he needed.
“I wanted to communicate more clearly with clients, deliver information faster, and operate more efficiently without sacrificing the personal touch,” he says.
The GPT that answers client questions better than he does
AI Mastery moved fast, and Edgar moved with it. The program’s training covered practical applications, tools, and frameworks built specifically for business use in AI.
Cracking his availability problem came down to a single module: building a custom GPT. The concept was straightforward: clone your knowledge, give it a voice, let it work while you’re busy doing something else.
So, Edgar built “The Home Inspector GPT.” He fed it his expertise, his tone, his professional standards.
Now, when clients have questions, they don’t wait for a callback. They get illustrated guides and step-by-step explanations that Edgar says he couldn’t have delivered as clearly over the phone. And the bonus: AI helps with productivity in ways he hadn’t anticipated, saving him between one and two hours every single day.
“It not only saved me time but also strengthened my credibility,” he adds. “Clients felt supported and informed.”
The book came out of the same momentum. Before the Quest, writing and publishing felt like something other people did, people with more time, more resources, a different kind of confidence. The AI Mastery community shifted that. Edgar wrote The Ultimate Guide to Maintaining Your Home, and it’s now available on Amazon.
“My biggest takeaway was the confidence and knowledge I gained to write and complete my first book,” he says. “Before this experience, that felt out of reach.”
The business numbers followed. In the months after building his GPT and publishing his book, Edgar saw a 30% increase in referrals and new clients, all without running a single marketing campaign.
What he learned was that showing up as someone worth referring turned out to be enough.
If I hadn’t taken AI Mastery, I wouldn’t have the confidence to become who I was meant to become.
— Edgar Castillo, real estate assessor
The book is live, the GPT is running, and he’s just getting started
Edgar is building a social media presence now. The book and the GPT generated so much interest that people started asking whether he had content online. So, he asked Claude for help, and it handed him a 30-day content creation plan built around what it already knew about him and his work.
“If I hadn’t taken AI Mastery, I wouldn’t have the confidence to become who I was meant to become,” he says.
He’s not finished. The program gave him a framework for thinking about AI as something that grows with him, one he can keep building on as the technology evolves.
And every new development in the space? It’s something he’s now equipped to engage with directly and on his own terms.
What this means for you
You don’t have to be a tech specialist to use these tools. Just look at Edgar, who is a home inspector. He took a chance on a course he almost couldn’t afford and built something that now works for him around the clock.
And the community that helped him get there is the same one that’s open to you. If you’re ready to discover what you could build with the right framework, the AI Mastery program is where you can start.
The future belongs to the curious, like Edgar and many more. The only question is whether you’re ready to claim your place in it.
