Growing stuff on the roof sounds like a great idea! Either way, good luck with that. We got into the chickens through a friend who said they were practically no work at all. That is bs. They are not a terrible amount of work; but everything adds up and with 6 it just got too stinky too fast. Now that I am down to four, my egg production is actually a little better (per chicken) I think because they are not as stressed. A lot less pecking at the combs too. We've got barred rocks, which when egg production slows down will be stewing chickens and we will get a fresh batch of young-uns. What we did is order a variety pack of 30; they usually give you some "spares". We sold off all but what we wanted and basically got our chickens for free.