My experience with this type of greenhouse have not been good. They do not last long in high winds. Usually being ripped apart at the seams. Even your plants will be blowing away. The lightweight steel frames are cheap and rust thru in apx. 2 years. I have not used this exact greenhouse. Just one like it and some smaller shelf like greenhouses.Go for a heaver frame of galvanized steel or build one of the PVC frame greenhouses. Depending on what you want to use it for this can be done for a very low cost if you dont need fancy. You can stake 4x4 or landscape timbers down with rebar leaving it stick up about 6" then bow the PVC from one stake to the opposite stake. You may need to connect two pcs in the center depending on the size of your greenhouse. You can buy 4 ways or make your own from two T's with a short piece of PVC between them. These will connect the bows together at the peak. You need this to stabalize the bows. I do this for mini greenhouses with 10' 1/2" pvc, bowing 1 pc. over a 6' bed. Then I tape them to a 2x4 or heavier conduit in the center which is supported on both ends with posts. Cover it all with plastic and attach it to the landscape timbers. rolling excess end plastic up in a 4x4 to make the ends. Makes a great little lettuce hut for winter. I put a board down the center to crawl on when I need to harvest. You could remove the cover for this if you wanted. But that is more work since I nail the cover down on the sidewalls. Rolling plastic around 1x2 then nail/screw it down, go to the other side and take up the slack and do the same.

Here is a link that might be useful: PVC pipe projects