Any one have one of those fabric coverd car ports? The arch top ones, that zip up. I realy need some cover for some of my projects, and it seems like one of these are the way to go. How much snow can they handle? What sizes do they came in? and mostly, how much do they cost? I would need one at LEAST 20' long.[my convertible is 19' long bow to stern] and it would be dice to get one wide enough to hold other stuff also. Any one use one?