I would like to have chickens again. I kind of gave up on them because of the hawks.
You could probably make a portable run for them with a cheap conduit frame with 1" chicken fencing for a lot less than the $1200 sales price. This might provide a good pattern!
https://www.chickenrangecoop.com/coops/chicken-coop-10x12 and https://mobilechickenhouse.com/portable-chicken-coops/