Just a consideration to consider:
I ordered mine through cw, custom made.
I paid cw and then dealt directly with the maker.
Excellent deal, excellent work.
My cover weights in at about 125lbs.
It has to be carried up your ladder and spread out over all the things in your roof while you dance around not being able to see the things you're covering due to the bulk of the cover.
That was on a 19ft trailer.
It may require a crane set up to get the cover on the roof.
Just a view from someone big enough to have done it.
It was very scary.