If she's still looking, what's out there is too small for the price, including the recent price hike on the large Harbor Freight one. (Have it, built it, love it, but wouldn't do it again. I paid $429, it's $849 now; plus all the supplies and labor to reinforce it.) Google "cattle panel greenhouse" or go to buildmyowngreenhouse.com The former is larger than what's out there via retail and cheap and easy to build (I built one as a chicken coop); and the latter is how many commercial high tunnels are constructed - they even qualify for the USDA grant. I bought the benders and some fence pole, but it's another one of my projects that's sitting in a pile for now. Jigglygreenhouse.com has the best prices for the hardware. With both of those options, the clear plastic to cover it is literally the most expensive part. The best part is that you can make either of them bigger, because a greenhouse is the same as a shop, you always need more space.