>all the retards ITT
Just start pumping out custom pocket knives. Hell you could do car or motorcycle parts too. Adapter plates, engine mounts, suspension parts, whatever. These things have a tolerance of +- 0.005" with no effort and probably 0.001" if you dial it in. That's more than enough 99% of anything you'd do at home, and it's an order of magnitude more than the whatever Alibaba crap is on the market right now.

Not every single job requires tolerances tighter than a nun's asshole