I have a 30 wide X 40 foot long 4-car garage to put my tractor and mower, and tiller, and chain saw, and stepper machine, and the rest of my wife's junk in. There is no room for an automobile!
I took a 16 X 20 corner, built an "inside" room in that only I have the key to, which is my shop. Fully heated and air conditioned, cable TV, Internet, and phone, and coffee pot.