I just finished framing my greenhouse for starting my tomato seedlings. It will be a temporary greenhouse that I just use for a couple of months in the winter. I'm trying to decide what I want to cover it with. The greenhouse is a quansit hut type of shape so plastic sheeting that comes in rolls is what I need. If money were no object I would go out and buy some greenhouse covering material for about $200. The greenhouse is only 8' x 8'. Will I get terrible results if I just use moreless clear plastic drop cloth and replace it every year or do I need to bite the bullet and get plastic specially made for green houses? Here is a pic.