A 4-Day, $250 Investment: Building a Profitable Directory Business with AI

Alright, let’s get real for a second. You’re sitting there with a decent job, maybe a bit of spare time, and you’re thinking, “I’d really like to build something on the side. Maybe an extra grand or two a month? But I’ve only got like, a few hundred bucks to play with.”

Sounds familiar? If it does, let me tell you about something I’ve been digging into that might just be the perfect fit. It’s called an online directory. Yeah, I know. Sounds like something from 1998. But that’s exactly why it works. The stuff people think is “boring” or “done” is often where the real money is hiding.

I came across this guy, Greg, who’s obsessed with these boring businesses. He had a chat with another dude, Frey Chu—they actually call him “Mr. Directory”—and Frey dropped a story that totally hooked me. He built a website in four days, spent less than 250 bucks, and it’s now pulling in 273 dollars a day. Every day.

The site? A directory for luxury portable toilet trailers. I’m not kidding. Let that sink in for a second.

Here’s what I learned from their conversation, and why I’m actually considering trying this myself.

First, Forget the Toilets for a Sec, Look at the Big Picture

Frey pointed to a few directories you’d never think twice about, but their numbers are insane:

• Parting.com: A site to compare funeral homes. Morbid? Maybe. It gets over 60,000 visitors a month and banks an estimated $1-5 million a year.
• APlaceForMom.com: Helps people find senior living. Almost a million visits a month. Estimated revenue: $50 million.
• GasBuddy.com: You probably know this one. People crowdsource gas prices. Over 100 million app downloads. They make money from ads and a premium debit card.

The point is, these aren’t sexy tech startups. They’re just really useful lists. They solve a problem: they save you time, they save you money, or they help you make money.

Why Bother Building a Directory in 2026? Isn’t AI Search Taking Over?

This was my first question too. If everyone’s just asking ChatGPT, why would they come to my little website?

Frey made two points that really clicked for me:

1. People use AI to discover, but they use directories to decide. When you’re looking for a new coffee maker, sure, ask the AI. But when you’re choosing a nursing home for your mom or a lawyer for a lawsuit? You’re going to do your own deep dive. You’re going to compare every single option. That’s what a good directory lets you do.
2. Local stuff is still king. Search for “haircut Los Angeles” on Google. It still shows you the local map pack and a bunch of local sites. Search for “hair gel” and it’s all Amazon and big stores. For local services, the old rules of SEO still apply. Build a directory for a local service, and you’re golden.

This is why Frey’s luxury toilet trailer directory worked. If you’re organizing a massive outdoor wedding or a film shoot, you’re spending thousands on a trailer. You need to see all your options. You can’t just ask an AI and cross your fingers.

So, How Did He Actually Build It in 4 Days?

This is the part that got me excited. He used AI tools to do what would have taken a team of people months or years. Here’s the blueprint, which is basically just smart data work:

1. Get the Raw List: He used a tool called Outscraper to pull every “portable toilet” business off Google Maps for the whole US. He started with 71,000 leads.
2. Clean the Crap (Literally): He fed that list into Claude Code (an AI coding tool) and told it to delete anything without a name, address, or city, and anything that looked like a big box store like Walmart. Boom. Down to 20,000.
3. Find the “Luxury” Ones: This was the key. He didn’t want regular porta-potties. He used an open-source crawler called Crawl4AI, hooked it up to Claude, and had it visit all 20,000 websites. He told it to look for words like “luxury restroom trailer” or “VIP trailer.” Three hours later, he had a list of 725 real suppliers.
4. Dig Deeper for the Good Stuff: He then sent the AI back to those 725 sites to pull out the details. How many rooms do their trailers have? Do they have AC? Heat? A sink? He did this step-by-step, because if you ask the AI to do everything at once, it gets confused and gives you garbage. This is a huge lesson: be patient with the robot.
5. Grab the Pictures: He used another AI tool to scan all the images on the sites and pick the three best ones for each supplier. (Quick note: He points out you should probably ask for permission to use the pics later, or just use stock photos. But for getting started, it’s fine.)
6. Build the Site: Once he had all this clean, rich data in a simple spreadsheet, he literally just handed it back to Claude Code and said, “Turn this into a database and build me a website.” The AI did the heavy lifting.

The whole thing cost him the $250 for software subscriptions and AI credits. Four days of work. And now it’s a passive asset that throws off cash every single day.

A Few Reality Checks (Because Nothing is Free Money)

Frey was super honest about this. He said, “If you need cash in the next six months, don’t do this.” SEO takes time. A new website isn’t going to rank on Google overnight. If you’re desperate for money, go mow lawns or flip furniture on Craigslist.

But if you’ve got a job and you’re playing the long game, a directory is a perfect side project. It’s low risk (a few hundred bucks), it teaches you a ton about AI, data, and SEO, and the upside is massive. Remember those first examples? Those were once tiny directories too.

Some Ideas to Get Your Brain Going

Frey threw out a few niches that are just waiting for someone to build a directory for them. The trick is to take a huge category and slice it super thin:

• Dementia Care Homes: APlaceForMom is huge, but you could own the specific “dementia care” search.
• ADA Bathroom Contractors: Everyone searches for “bathroom remodeler.” Almost no one has a site just for contractors who specialize in wheelchair-accessible bathrooms.
• Tap Water Quality by Zip Code: One guy used public government data to build a site that tells you what’s in your water. He gets 40,000 visitors a month and makes money recommending water filters.

The formula is simple: find a big, messy industry with lots of choices and high-stakes decisions, then use AI to organize all the information into one clean, simple list.

My Takeaway

For me, the biggest takeaway wasn’t even the $273 a day. It was the realization that data is the new gold, and AI is the shovel. The hard part used to be collecting and organizing the data. Now, with tools like Claude and Crawl4AI, one person can do in a weekend what used to take a whole company.

It makes you wonder what other “boring” industries are just waiting to be organized.