Our Experience:
We purchased a car canopy from Costco. ~#200 then got some thick walled pipe and cut to fit inside the frame tubes of the canopy. Raised the canopy high enough to clear RV. Then purchased some concrete fence post bases (had metal frame for post). Bolted the pipe ends to the post base (added some weight) then anchored the concrete bases to the ground. It was just wide enough, and long enough to cover most of the RV.
The cover only lasts about 3 years. Replacement covers are about $150. Couldn't get exact replacement from Costco so had to find another which was slightly larger. This required some extension tubes as the frame had to be 6in longer and 6in wider than original. This was actually a good thing. Provides better coverage.
Total initial cost (with extension tubes) was about $240. For six years of protection it has cost $430 (more extension tubes $40 + replacement cover $150).
Need to secure the frame as wind can rock it around a bit. Have some lines that anchor from the top of the frame as well as anchoring the tubes to the ground. Have made it through some 50 mph gusts with no damage.
Would like to get some metal type roofing to screw to the frame but that may be more trouble than its worth. If I get tired of replacing the cover might just spring for a metal cover. That would probably be about $2000.
Very glad we have a cover for our RV. It was quite an investment for us and we want to protect our investment. Only have to wax it once a year, don't have to worry about leaks when stored, less issue with uv damage to seals, plus the finish stays looking new much longer. We do a roof and joint inspection every six months to fix anything that looks questionable.
For us some type of cover was mandatory.
