This is initially in the area I was thinking of. Generally our current needs are 2d. Engraving panels, to start with scoring panels for further hand processing would be fine.
Milling circuit boards. PNP and acid etching and sending files out to labs are fine. But there are some boards like the Cynbal, that hand dipping is not worth it. Sending files out to a lab is great the higher the number of boards the cheaper they get with placement markers make it tough yo beat but low volume or custom or incremental or extended ground or hi Q optimization etc can't be beat.