I read this somewhere, quite a while back:
Anyone who says that their shop is large enough, doesn't spend much time there
My current building is 30' x 70', with 9' finished ceilings. It isn't a bad size, but it's tight for some work. My smallest shop was 20' x 20' with 7' ceilings (underneath a garage) ... that one was no fun, you'd bang your head if you sneezed
You can make anything work, if enough time is spent organizing the machinery & figuring out material flow. When a job calls for buying steel in 20' to 24' sticks, those come in through an overhead door (garage door) & go directly to the horizontal band saw for dimensioning. The smaller pieces go to the machine room for drilling, tapping, milling, and return to the first room for welding, grinding, and final assembly.
There's no room for steel storage where it needs to be, so the steel rack is located 70' away from where it comes into the shop ... which means that there's never a huge amount of material in the rack. But there's enough to get through almost any emergency job, or portable welding job. Everything else is ordered on a job by job basis, which reduces the amount in inventory.
Figure on 60' x 60' and it should be just about right:thumbsup: