The Operator’s Notebook

Turning public data into products people pay for — real files, real costs, real numbers, and the AI that makes it possible.

In This Issue11 Dispatches · Updated June 24, 2026
DATA ARBITRAGE$4cost per countyCounty data value (indexed)254TX counties2.3M+records indexed
Cover Story — Growth

What 4,100 Cold Emails Taught Me About Selling Data Products

Four campaigns, four audiences, 4,100 emails. Construction bounced at 9%. Wholesalers at 13%. Agents opened but never replied. Investors are the only signal still breathing. Here's the honest scorecard.

Read the story →·9 min·June 24, 2026
Featured
DATA ARBITRAGE$4cost per countyCounty data value (indexed)254TX counties2.3M+records indexed
Systems

How I Monitor 20 Texas Counties from a Mac Mini

My entire data pipeline runs on a $699 computer under a desk. LaunchAgents, Python scrapers, Supabase, and a self-healing cron system that watches 800…

8 min · June 23, 2026
DATA ARBITRAGE$4cost per countyCounty data value (indexed)254TX counties2.3M+records indexed
The Playbook

I Rebuilt a Real Estate Website and Lead System in One Afternoon

39 pages, a lead pipeline, an admin dashboard, GA4, DNS migration, and three SEO posts — all from a WordPress site that hadn't been touched in two yea…

7 min · June 22, 2026
The Newsletter

The playbooks land here first.

Real files, real costs, real numbers — how to turn public data into products people pay for. Join and I’ll send you the Data Arbitrage Starter Pack to begin.

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The Index
01
SCRAPING PUBLIC RECORDS8M+property records loaded12counties$0total cost100% public data.CSV.SHP.DBF.XML
Scraping Public Records· 10 min · Jun 21, 2026

How I Loaded 8 Million Property Records from 12 Texas Counties for Free

Travis, Harris, Dallas, Bexar, Tarrant, Collin, Fort Bend, El Paso, Galveston, Nueces, Cameron — every parcel, every owner, every value. Total cost: $4. Here's exact…

02
THE DATA-QUALITY TRUTHSOURCE ASOURCE B+FACross-reference fills gaps2 bad sources = 1 great dataset
The Data-Quality Truth· 7 min · Jun 20, 2026

The Cross-Reference Trick That Turned F-Grade Data into A-Grade

A foreclosure record with no address is worthless. But when you cross-reference it against a free county appraisal roll, it becomes a lead with a street, a value, an…

03
SCRAPING PUBLIC RECORDS$parse_cad --county=harris~delimiter: |\t|,|~|^|~encoding: latin1 / utf8 / cp1252OK682,441 rows normalized$_FORMAT CHAOSTSVCSVXMLFIXED~ | ^ \tevery county, a different delimiter
Scraping Public Records· 9 min · Jun 19, 2026

Parsing Every Weird CAD Format in Texas (Tilde-Delimited, 10K-Wide Fixed-Width, and the One That Was Just an Excel File)

12 counties, 12 formats. Tilde delimiters, 9,716-character lines, values stored in cents, multi-file SQL joins, and one county that just handed me a spreadsheet. The…

04
THE THESISDEAD2%open rateinstead:SEOcontent-led{ }communitypartnershipsproduct-ledData products sell themselves when the data is good enough.
The Thesis· 6 min · Jun 18, 2026

Cold Email Is Dead for Data Products — Here's What I'd Do Instead

I sent 1,362 cold emails to real estate professionals about a data product. Open rate: 23%. Reply rate: 0.0%. Here's the post-mortem — and the three channels I think…

05
DATA ARBITRAGE$4cost per countyCounty data value (indexed)254TX counties2.3M+records indexed
The Thesis· 7 min · Jun 18, 2026

What Data Arbitrage Actually Is

Every era's power belongs to whoever controls its key resource. Today that resource is data — and most of it is sitting in plain sight, mispriced. Here's the busines…

06
LEGAL FRAMEWORKPIACFAAPublic records = public by lawhiQ v. LinkedIn confirmed: scraping open data ≠ unauthorized access
Scraping Public Records· 8 min · Jun 17, 2026

Is It Legal to Scrape Public Records? A Builder's Guide (Not a Lawyer's)

Public records are public by law. So why does scraping and reselling them feel like a gray area? An operator's honest read on where the real lines are — and how to s…

07
COUNTY DATA PULL1 email → entire countyPublic Information Act request$4for GIS shapefiles$0ownership data (free)
Scraping Public Records· 8 min · Jun 16, 2026

How to Pull Texas Appraisal District Data for $4 (The Free Way Most People Miss)

Most people pay list vendors hundreds a month for a worse version of what the county will hand you for the price of a coffee. Here's the exact email I send — and wha…

08
DATA QUALITY TRUTH65%real match rateVendor claims:95%Reality:~65%
The Data-Quality Truth· 7 min · Jun 15, 2026

Why Your Skip-Trace Match Rate Is 65%, Not 95% (And Who's Lying to You)

A vendor promised 95%. The real number — names tied to a phone I could actually dial — was 64%. That gap is the most expensive misunderstanding in property data. Her…

The Newsletter

The playbooks land here first.

Real files, real costs, real numbers — how to turn public data into products people pay for. Join and I’ll send you the Data Arbitrage Starter Pack to begin.

No spam. Unsubscribe anytime.