Suggestions/recommendations for motorhome cover

I used an ADCO cover for 13 years on our last RV and it kept it clean and looking like new. Never had any damage but we don't get a lot of wind here - some but not much.
I would get the Adco with the Tyvek top in a "custom" build. This will allow you to have the door opening where you want.

The only step up from there is a carport, which is what we did for our new TT.