Something that worked well for my first fully enclosed, walk-in chicken shelter was recycling the circular frame from a 12' trampoline. Also works well for greenhouse frame. Can usually find free used trampolines, the mat works well for shade cloth, too, can handle the sun and even has D-rings for tie down. Sturdy steel tubing can be broken down into halves or quarters, just covered most of it with heavy duty stucco "chicken" wire, runs around $150 at Home Depot for a 100' roll 3' wide (maybe more these days with the trade war). The rest I used corrugated steel roofing for a solid area for roosting/nesting and wind break, self tapping roofing screws attached it to the framing. Anyway, get creative, doesn't have to be expensive and it can still look nice with some creative problem solving. Reduce, reuse, recycle. Good luck!