I see $25 and $38 - I think the difference there is thickness; I'd spring for the tougher one. Can't imagine what a $200 panel has that's worth the price. Ah, maybe I can! The expensive ones are probably polycarbonate .
https://www.acplasticsinc.com/...
You don't have a snow-load to consider. We get lots of snow, so we pitched the roof of the garage-tent steep enough to let it slide off. The $35 panels from Home depot worked fine, and we didn't buy all the under-foam and accessories: just 2x1 horizontal strapping at 18" intervals, pre-drill the holes and use a soft washer on the screws. We didn't have to do a lot of cutting, which I understand can be tricky with these panels. And of course, I don't know how long they will last. The ones on the unheated greenhouse have served well for six years.
