That looks pretty cool! I just replied to your other post. It looks like it should be a great temporary greenhouse if it lasted through the storm you just experienced.
Saturday, I finally ordered a roll of clear plastic here. Fellow gardener recommended the business. It should be delivered Friday. I won't know the price until Friday, but they give a discount to MGers. My friend paid $310. for a 28x100 ft roll. I ordered a 20x100 ft roll. Hope mine is a bit cheaper. BTW, the hand clamps are from Harbor Freight.