It's going to roil the waters further, but I did do it for 2-3 years back in the '60s. Little aluminum parts for a prototype spectrometer. Stuff that would fit in a small matchbox. It was a shoestring operation, and that's what we had, so I did it. 1/8" diameter mills, depth of cut maybe 1/16". It got the job done. I also cut rectangular aluminum plates out on a Shopsmith, using a 6" diameter carbide-tipped slitting saw. OSHA would have a fit today, I'm sure.
When I moved to MI in 1994 I had to sell my US Burke, but soon bought one of those "post" type mill-drill machines. I think it cost about $700 at the time, from Production Tool, just outside Detroit. R8 spindle, so at least what tooling I kept still worked. Still have it. It does well enough that I don't feel too handicapped. It grew a DRO on the X-axis. My only real problem is the short X axis. It's only about 12", and I sure could use twice that for some jobs.