Many times the 10X12 greenhouse kits at Harbor Freight have tempted me at around $550 on sale but I have never dropped the hammer on one. Clearly they are not plug and play and it appears if you are going to do a lot of mods and even then in a strong wind it would go away all together you would be better off building from scratch. It won't happen this year but I really would like to extend the growing season. Plenty of free plans out there. 15 Free Greenhouse Plans DIY Where to Get DIY Greenhouse Plans for Free 10 ft. x 12 ft. Greenhouse with 4 Vents Substantial modifications. Six years and the panels are cloudy.