nice on the sales! WOOT!
for the greenhouseplastic you might want to check into PVC glue its made specifically to fuse (rather than glue) plastics so it should give you a nice tight easl on the overlaps...
i keep thinking that i want to try and get hold of the shrink wrap they use for boats but in a clear (like the gift basket shrink wrap but thicker and HUGE-normous!) then you ust stick it over the fram make sure its properly clipped down so it doesnt shring in ways it shouldnt and then a hot air gun over the whoel thing...that owuld make an AWESOME greenhouse...but i cant for the life of me find the BIG shrink wrap stuff in a clear...its only in white for boats

but i KNOW i saw some in a transparant at the docks my dads boat used to be on...so i know they make it...