When we bought this place "my shop" was a 28 x 40 pole barn, which I thought was adequate, but downsized from the 30x80 I had at the other place. This one had 2 garage doors as opposed to the one at the other place, so I thought it would work out pretty good.
Then I said something to the wife about bringing some of her sheep to this place since she was feeling bad about not having her sheep, the kids growing up, etc. We were both selling our homes to buy one that neither of us would feel out of place in, and both giving up some things we liked in the process of making a fresh start as a couple and I thought the sheep would ease the transition for her.
My shop is now a 12 x 28 section of the pole barn, the rest being primarily hay storage. The Case parks inside and the Cadets are outside in the woodshed during the summer. In winter, I rearrange what is parked where, bring the Cadets inside, put the small spreader and as much other stuff as possible in the aisle in the woodshed, and put a lot of hay in the barn. The "big" trailer will have one large square bale of alfalfa at a time stored on it while the grass hay will be on pallets and take up about half the 28 x 28 space.
My shop isn't big, but it's got a furnace, is insulated, very well lighted, and has running water but no toilet. By moving things around, it serves as a tractor garage, wood shop, welding shop, storage area, and whatever else is needed.
The wife is happy with the sheep and donkeys, the equipment is all under roof, and I can work in comfort up there unless it's a blazing hot summer day since there's no A/C. Life is tough!
TMBER -- your Cadet is way prettier than either of mine. My old 109/129 has been through things that would make yours have a heart attack. It has mowed, plowed snow (oftentimes in subzero weather), cleared fence lines, cut and maintained trails through the woods, dragged brush piles, hauled heavy trailer loads of rock, moved gravel, hauled trailer loads of firewood, and generally worked hard for about 35 years now. It has some battle scars and has had an engine transplant making it into a 129, but it's a reliable workhorse. The 1215 is just a lawnmower by comparison -- it doesn't even have a driveshaft -- but it has spent a lot of time and miles teaching lambs how to walk on a lead so the kids could show them at the fair, cutting and bagging grass for feed, and so on. Yours is just a young kid in comparison. Expect many happy years with it.