My 3-Machine AI Lab: How I Divide Work Between a Mac Mini, a Windows PC, and an Ubuntu Box

I keep seeing posts about running AI on a single machine. "Just use Ollama on your laptop!" Sure, that works — until you want to run a 30B model while your IDE is indexing, your test suite is running, and you're editing a video. I have three machines. Not because I'm rich — because I kept old hardware alive and gave each one a job. Here's how I split AI workloads across a Mac Mini M4, a Windows PC with an RTX 3060, and an old Ubuntu box, and why one machine was never enough. The Three Machines M