Yes that is a great way to make a hoop house, PVC is cheaper but metal is the way to go and that setup you are looking at is slick it was the best one I have seen for that type of large scale bending. As for poly I am still not sure what I want to go with next time although UV material last longer than cheap plastic you buy at local hardware.

My goal is to use polythene next time I rebuild mine but looks like the pole barn roof get's priority and with a 30x40 it will drain my tax return....oh well.

Looking forward to seeing your hoop barn when you get it going. Big fan of hoop houses around here and they work well....better than glass they say.