I've been tempted to put one together to help overwinter tender perennials. They are a fairly cheap way to put a greenhouse together. Go see what David (not me) did with $50!

Here is a link that might be useful: $50 Hoop House

I tried to go to this link but all I could get it to do was show me the picture and first part of the blog. Looked pretty interesting - i'd love to read the whole article.

I had a commercial sized "H' type hoop house a few years back. It had intermitten mist system, bottom heat and lots of room for growing on after rooting. I loved it, made some money selling plants - life changes - I miss it and plan to do it again when I retire. Smaller scale tho, too old to do all the work that a big house requires.

Here is a link that might be useful: garden tips