i have a winkler hoop barn for a calving barn. I love it, it is nice and bright, it doesn't swet like a metal building. And if you get a trussed beam hoop they are very strong, but the single pipe rafters are some what weak.
Since you are using it for a finisher i would talk to some one that uses both, and go look at them and see how they work. I know that small things can make or break a confinment feeder. So research every thing before you start.