Livestock panels can be a great structural component of a coop or run ....but like almost everything chicken,
it depends.
I would not recommend using PVC for hoops.
Climate can play a great part in deciding what kind of housing to build.
Predator proofing almost always calls for 1/2" hardware cloth, which is expensive stuff and a hoop coop can need a lot of it.
Mobility can quickly become a trade-off between ease of movement and space for a certain number of birds.
I built one last year that was used for 2 batches of meat birds, neither mine, one for some free range cockerels and one for some pastured turkeys.
https://www.backyardchickens.com/a/aarts-hoop-coop-chicken-tractor
We are still tweaking the wheels, aprons, and handle.....but it cost about $350-400 in materials.
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hoop coop