Garage will probably be used for "stuff" and my wife is a basket weaver/chair caner and general crafter and always has "junk" around her. Between bicycles, tools etc. we'll probably fill it and use it like a work room when we're camped. Maybe one of those tent enclosures. Of course, I'd love to have it big enough to haul a vehicle, but might be a waste since flat towing isn't a big challenge.
My diesel tractor seems to always be ready to go even without running it for a month or so and I've had it for 25 years with no problems, but simple diesel compared to the modern machine. Filters are important, but oil changes seem to be more of an "hours run" thing than time, other than once a year.
We need to hear from the old timers.
Know what you mean by BIG. The darn turning radius alone has to make you good at backing and filling
