1" PVC conduit frame and $20 Job Lot Tarp. Sheds most all snow except the real sticky stuff. Then just use a broom. Would also buy a 10'x20' shelter if I had the $$$$$$.
I have a boat cover I bought from Cabelas six years ago to cover my 20' CC with out t-top. What I do is put some milk crates with beach balls on the deck to create peaks, it works well for me.