It wouldn't need that much $ at all, a fair sized CNC rig that could do this would run you about $20,000 including software and tooling. I built my own once (for plasmacutting sheetmetal) for about 2/3 of that, and that's already quite a while ago, I'd expect it to be cheaper today.

This is actually a really good idea you've got there, you should do something with that!