Maybe consider having a small shed? I have recently bought a set of rims for my snow setup. If you can spare the cash on some extra rim set I think it's worth it. My brother has 4 sets of rims... 1 for track, 1 for daily, 1 for show, & 1 for the snow (rearly used). It's not hard to change the rims from or cars so I would never pay unless I feel lazy but even then my fear of someone scratching my rim would set in and I do them myself anyway lol.
Granted they will sit there but you won't see them till you want them. Just put them in one of these
Tire Rack Tire Garage
and leave them in the corner.