I'm seriously considering investing in a CNC mill, specifically a Probotix Fireball V90. It can machine plastic & wood in upto 12"x18"x2.5" pieces all day long and cut light aluminum to shape on occasion. I'm severely disabled, on a ventilator even, so can't really get out in the garage to build stuff without help, but consider myself a good technical designer in CAD. Cutting parts for my robot & woodworking will be its main job for me.
I've got ideas for custom pan/tilts, small linear actuators, custom drive tracks, & a self connecting charging station.
Anyway, this will be one of the biggest purchases I've ever made, makes me kinda nervous... So I'm looking for ideas for things I can machine & sell in parts form to at least partially help my payoff strategy.