Here's my 2 cents worth.....
The best way to go of course is a carport (which we can't afford yet either). We live in northern Arizona and get high winds and hot summers. Reading online I found out some RV covers can get very hot underneath and that's bad for everything (I mean really hot too, very surprising).
The last 2 covers I bought for previous trailers cost over $400 apiece and were supposed to be the cat's meow. Neither one lasted more than one season before tearing apart.
With the A/C, Maxair covers, omni directional tv antenna, extended rain gutters and ladder on our 2013 Surveyor 220, I just don't want the trouble of a cover. Getting a cover off and on a 27' foot long, 11' tall trailer would be daunting. I'm 63 and conning my lovely wife into getting up on the roof of that thing is getting fewer and farther between!
I figure I would only have to buy 9 or 10 covers to pay for a carport so that's what we're saving up for. We have enough room for one anyway.
Good luck with your decision; maybe a cover is better than no cover, who knows?