I have a couple (CNC mills). It's not about selling the house, it's about having a profitable use for one or more...
Garages are the worst place for any precision machinery. Garages are for vehicles. To maintain accuracy and machine viability, you need a climate controlled enviroment and a substantial base, like concrete, in my case 8" thick, heated in the winter and air conditioned in the summer.
A nice overhead crane works for setting heavy machines....have on of those too.
You'll need a good air supply because all CNC machines utilize clean high pressure air so a compressor is in order, preferrably a rotary screw with a refrigerated dryer. I have 3.
Finally, you can have the best CNC equipment available and if you don't have the programming knowledge plus the knowledge in tool and cutter application, the machine, for that matter any machine, CNC or manual is just an expensive paperweight.
I have my journeymans card it T&D and I'm learning everyday.
It's all about wants and what you really need.....
Your local machine shop would be the go-to place. They already have the knowledge and the machinery. Let them do it. You'll be farther ahead.