Building a 6-Figure AI Phone Stack on Supabase and VAPI: How Load Bearing Empire Replaced Twilio with Self-Hosted Asterisk

Load Bearing Empire deployed a fully integrated AI infrastructure across six businesses—real estate, demolition, valet, credit repair, and SaaS—by eliminating third-party communication vendors and building a custom JARVIS Brain Router on Supabase (project whxtjboruayowkqyjvcq) with 26 VAPI agents orchestrated through Asterisk 18.10 PBX on Vultr. This article breaks down the technical architecture: 98 relational tables, 42 Edge Functions handling real-time inbound/outbound routing, self-hosted infrastructure reducing per-agent Twilio costs from $0.025/min to near-zero, and the exact configuration that enabled a solo founder to automate customer acquisition and operations across vertically integrated service businesses. We'll cover database schema decisions, VAPI agent orchestration patterns, PBX dial plan logic, and why open-source telephony infrastructure became the cost multiplier for aggressive scaling.