Buy one of those tent style garages, The company that makes them is called Cover It. I had a 12'x20' and it was awesome, but the city code enforement thought they were incapable of holding 40lbs/sqft. of snow, so I took it down before I got fined. But if your area doesnt frown on them, go for it. Doesnt stop the cold, but keeps the moisture off it.
yOU CAN STORE avehicle in a storage unit . Only thing is your not allowed to work on it in the storage unit . and you can't have any leaks or hazardous materials in the storage unit . Your probably lookin atleast 140 min a month to store it depending what the economy is like where u are .I have a 10x10 storage unit and its 74 a month . also i have a outside storage space for my truck i don't like it out side but i dunno what ours would run me - if i changed from out side to inside ( i know i'd pay more WAY more -) I am currently paying 30 a month to store my mini outside.
Michael.