Maybe i am crazy, but I am so excited! I think I have a great idea for a cheap greenhouse. You know those portable kinds for about 300 dollars? Well last year I bought a family dinner pavilion for 30$ from Wa-Mart. Why can't I build a base out of pressure treated wood, erect my pavillion frame, attatch the pavilion frame to the wood base (for stability)and instead of putting the tarp on, cover it in plastic. I realize that the plastic may not last long but it is soooo cheap. I have a good size cold frame, and as long as you take care in putting the plastic on, there is minimum damage. What do you guys think? I can get 4x100' plastic for 14$. Hey it is a good start and good practice for when I can afford a real greenhouse. I'd love to hear your ideas and comments.