What a beautiful and well built structure. Maybe the nicest I have ever seen.
As noted by others, it wouldn't matter if you built 100' x 100' ft, you'll want and need more room. How about, you make this place your shop, insulate it to work in the winter and build a 42x60 or 60 x 90 pole barn for equipment?
Yeah, I thought the same thing but many barns later I could still use more. This is a disease in which accumulated goods will expand 25% over the space allotted to store it. I think it's one of Newton's Laws.