I got the kit here: https://jordantruss.com/jordan-truss-services/pole-barn-truss-manufacture/
42' x 36' (interior), 12ga roof panels, steel truss, posts are PT 8"x 8"x 18ft for a 14 ft eve height, 4:12 pitch. Cost $4500 delivered, plus $550 for stamped Engineering drawings.
I'm going to rent...