Barn Greenhouse

So a few notes... We added a base of 2x4 pressure treated wood footing around the entirety of the greenhouse which should help keep it from rotting? Blocks are an alternative here. Our lumber store didn't carry the right size of tin sheets so we added a 2x10 at the bottom which seems to work and still look okay. We picked up a 30" metal screen door there which should assist in keeping out the critters and allows us to lock out our small kiddos who might wreck the plants :) This is a great plan!!! Thank you so much! Oh - materials ran about $700 including screen door? We went through about 4 1-pound boxes of sheet metal screws and at least a large box of 3" screws?? and 2 small boxes 1.25"?? If you cut you pieces right you may end up with an extra 8' clear sheet of corrugated plastic? We spent about 20 hours building just the greenhouse but we had hauled a lot of stuff to the site by hand... We are new to carpentry and pulled this off so anyone can do this!! Dremel tool works for cutting plastic, but not as good as the tin!! Good luck and cheers!