Hi! We continue to work on remodelling an old tack building on our farm into a chicken coop. It is an 8' x10' permanent building with high rafters. The chickens will also have a 16' x16' fenced in run for daily use. I also plan to provide supervised "free-ranging " in the evenings. What would you think would be the maximum # of chickens that I should have with this set up? Thanks for all replies!