Would you be able to create a coop? How will you ensure they don't get sick and die which is common with non-farm chickens.
Lots of online plans, e.g.
https://morningchores.com/chicken-coop-plans/#free-plans
Ours was something like this:
https://web.archive.org/web/20180118072607/http://www.freshe...
A wood frame base. A PVC frame on top of it. Plastic netting covering it all.
Sleeping quarters inside was a small wooden doghouse (with liftable roof) that had comfortable roosting beams attached inside.
Newspaper on floor of doghouse to replace every once in a while to clean.