The garage is definitely huge. And the ceiling height in the garage looked to be around 10+ feet. Plenty of space and storage. The shop itself appears to have been a woodshop for a previous owner. If I had to guess, I'd say the dimensions are somewhere in the neighborhood of 16' x 25'. It has large double doors for the entrance so someone was building some bigger stuff in there. It has electric (and supposedly heat) too which is a huge plus.
I don't even know what we'd do with the space above the garage. I doubt very seriously we'd ever have it in use as an "in-law" suite. Rental *might* be an option but we'd have to jump through some hoops with the township and it may not be doable without a ton of work. It's built out right now as 2 separate spaces. You walk up to a small landing with a doorway to your left and your right. Each side is home to a living room and kitchenette plus one bedroom and bath. I guess that would be the GTG hotel space for you far away travelers