I needed a CRM. I had $0 budget. So I built one with GitHub repos and AI. Last month my close friend needed a CRM for my startup. HubSpot wanted $99/month. Salesforce wanted $300/month. So I did something crazy: I built one using only free GitHub repos and a single AI prompt. Here's the exact stack GitStack gave me: Tool What It Does GitHub Stars Supabase Database + Auth 78K n8n Workflow automation 46K Metabase Analytics dashboards 41K Cal.com Scheduling 32K Total cost to run: $5/month on a VPS vs HubSpot/Salesforce: $99-300/month That's $3,600+/year saved on ONE tool. But here's the real magic — The Master Prompt GitStack didn't just give me the tools. It gave me one copy-pasteable prompt that I fed into Cursor. That prompt built: Database schema Authentication system API endpoints Frontend UI Deployment config From "I need a CRM" to "It's live" in 2 hours. Total spend: $5/month. Not $300. This isn't just for CRMs Build It Once, Sell It Forever Here's what most people miss: I built that CRM for $5/month.…