There is always going to be a need for small shops to do the jobs the big companies with lots of overhead can't or will not bother with or to be just sub-contractors. In Michigan close to where my wife has relatives there within a 100 miles or less to Detroit there are/were lots of small mom and pop CNC shops making parts for the automotive industry.
Most of the shops I drive by were either large garages or metal buildings behind the house in a small town or acreage. My wife has a nephew who is very talented in CNC and metal fab worked at one on M60 west of Jackson.
Retired Guy- Central Iowa.HVAC/R , Cloudray Galvo Fiber , -Windows 10