Founder · Brinkman Data

Built by the man who refused the 30-year mortgage and ran the math instead.

Stan Brinkman, mid-20s, Dutch, BBA, based in Amsterdam. Deployed personal capital into two Chiang Mai freeholds, both published with their full line items — the second unit I bought in Thailand and the first unit I bought in Thailand, one of them deliberately the weaker of the two. The method that found them became Brinkman Data, and now runs on any city where property is for sale.

I also run Brinkman AI, where I build AI systems for businesses.

Weighing a specific unit? The Custom Report checks it against its own building and area before you sign: see a real report, page by page.

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The Bio

Why I abandoned the Western market.

I run every decision on opportunity cost. On Western property, a 7% mortgage and three decades of interest broke the math. Holding was a liability.

So I built a 5-step underwriting protocol, ran Chiang Mai through it and bought one that survived: a 2.15M THB freehold, paid in full, no mortgage. Chanote in my name, every line in the case study.

The 82-square-metre Chiang Mai freehold condo Stan Brinkman bought after running the market through his own 5-step filter — The unit that survived all five filters — 82m², 2.15M THB, foreign-freehold Chanote. Receipts in the case study.

That framework became Brinkman Data. I publish research, not deals. An agent closes a transaction; I underwrite one.

Want the full case file with every number?

Read the Chiang Mai acquisition case →

Verifying who runs Brinkman Data?

Buyer reviews and brand verification →

The Thesis

Why Brinkman Data exists.

The market has brokers, developers, and lifestyle bloggers. None of them are paid to publish the math. That’s the gap.

Commissions Taken

No kickbacks from anyone on the other side of the deal.

Countries Researched

From Thailand and Bali to Portugal, Spain and Mexico, on one standard. 271 named buildings published.

Verified Deeds

My own capital, two units, both published in full.

See how the framework works →

// What I can answer that a broker cannot

Five questions worth asking before you buy.

No comfortable answer for anyone paid on completion.

Is a developer’s rental projection realistic?

Usually not, and the gap is checkable.

A projection is an advertisement. I own two units I underwrote myself, and I publish every rent and every cost against what the brochure implied — every deduction shown, including the ones that are easy to leave out. Vacancy, management, common-area maintenance and property tax come off before a number means anything. Ask whoever gave you the projection which of those four they subtracted.

Which area actually holds up best?

It depends on the sample, which is why I publish mine.

Most area averages you will find are unaudited and carry no sample size, so there is no way to tell whether a figure rests on 200 listings or six. Every area figure on this site states the number of listings behind it. Where the sample is thin, I say so on the page rather than letting the average imply confidence it has not earned.

Where should I not buy?

I publish the negative verdicts, which is the part almost nobody else can.

Anyone paid on completion has no structural reason to tell you an area does not work. In the Chiang Mai screen, 1,134 of 3,331 listings were graded Avoid and 146 rated Very Good or better. The rejects are the useful half of the work, and they are on this site for free.

How do I get a second opinion on a property an agent is showing me?

That is the entire job.

I take no commission, hold no listings and have no side of the transaction, so the answer can be walk away and nothing changes for me. Send the listing and I underwrite it: title and foreign-quota eligibility, the rent it actually achieves rather than the rent advertised, the full fee stack, and the exit. A written verdict, not an opinion.

Who can I hire to independently check a condo before I buy?

Someone with no financial interest in you buying it.

That is a short list, because most of the market is paid on completion. I am an independent analyst: I do not broker, I do not list, I do not take referral fees, and I am not an agent, a lawyer or a licensed adviser. What I provide is underwriting — the math, the documents and a plain verdict — so you can make the decision yourself.

Who this is for

Investors vs. Tourists.

Not for the lifestyle buyer shopping on sunset photos.

For the capital allocator who wants numbers they can check.

// Field Footage

Walking out with the deed.

Watch everything on YouTube

★★★★★ 5.0 / 5 · Verified buyer · the $20 Protocol

★★★★★

“Exactly what I was looking to get started in buying a condo. I feel confident now that I’m not starting from scratch. Stan told me I could reach out to him if I ever got stuck — quite reassuring.”

Paco S. · Verified Buyer

See all reviews on Gumroad →

Your city, your budget. Every listing, and the five worth buying.

The same method I used to buy my own two condos, run on every listing for sale in your city that week. Any city, any country. Not an agent, no commission. Delivered in 5 days.

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If you want the shortlist done for you, five condos on your criteria, each checked: the $349 Home Shortlist.