I wanted a car shelter that I could keep up for a few years to work on motorcycles. I bought one from Quictent...the upgraded car shelter for a very reasonable price in white. It has 4 poles on each side...not 3 and is 10' X 20'. with zippered doors on each end. The material seems very good. I mounted the structure on a cement pad. I added 4 horizontal poles-electrical conduit metal poles in case of a good snow, but not sure if its necessary. When constructing, I did most myself, but having a friend would help and warmer weather might make it easier to stretch material, but not sure. Advice...I would not put all the bungees on one area while you put sides and roof on so you don't strain the grommets unnecessarily. Do every other one-then go back and add bungees. Also..customer service was great...I used more bungees than I should have and they sent me a bunch more for free. I feel like they will be there if I need warranty parts.