Look at the problems on this web-site to answer your question. Mice and squirrel damage, water in hydraulics from rain and condensation, problems created by rust (clutch, brakes), seats coming apart glue getting wet, electronics getting wet. Since you have a floor you are able to notice leaks, before you run out of fluid. You do not need anything fancy, plus you get to build yourself a man cave and a dry place to work on your tractor.
Just me, but how one keeps their equipment tells me a lot about the person.
Just me, but how one keeps their equipment tells me a lot about the person.