I had to look those words up in the dictionary. Yep, those are three words that do not go together, unused shop space. I have a 2 car garage, 3 bay door 4 bay pole barn, barn,equipment shed and machine shop in the basement at the house and on another piece of property a 5 bay garage and 2 car garage. I still don't have any unused shop space. That's what I get for being a pack rat all my life. But I bet I got what you need, if I can just find it.
Doesn't take long does it. I think I find junk (lightly used equipment and parts) faster than I can build. It's either a addiction or disease, probably both.
Unused space? Whats that? I have a large bank barn, 60' machine shed, two large garages, basement plus a couple of other buildings full. Hated those Navy days where you had to watch your weight limit for a potention move!