Preserving/Protecting new TC without a garage?

Farm-Tek makes dome very affordable shelters, their Clearspan line comes in manby sizes and are fairly easy to erect, my wife and I erected a 45 wide x 18 foot high x 75 foot long one ourselves (I did use my front end loader to erect the arches) and it's been up at leas 15 years now with no issues.

I put my TC on a boat trailer and roll it in the garage when not in use. I expect it to last a long time.