Building a B2B SaaS Lead Machine for Steel Detailing: 301 Scraped Fabricator Leads, 5-Touch Email Automation, and Supabase

In 2026, we built Load Bearing Detailing from zero to a working sales infrastructure in weeks: 301 Texas fabricator leads scraped from Google Maps, a 5-touch email automation engine, and a 6-table Supabase schema that tracks leads through quote-to-revenue. This is how we engineered a technical sales funnel for structural steel detailing—a $100-400/ton market where precision data and persistent outreach compound—using Next.js, VAPI for call routing, and self-hosted infrastructure. Here's the full stack.