Weekend Load balanced Application and DB Cluster Deployment with HAProxy

I have seven freshly racked Ubuntu bare-metal servers on the same private network and I want them production-ready before the weekend is over. Architecture to build • 3 servers become the application... (Budget: ₹12500 - ₹37500 INR, Jobs: Cloudflare, Cluster Computing, DevOps, Linux, MySQL, Network Administration, Node.js, Redis, Scripting, Server)