Ok so I live in Georgia. My chickens can go out of the coop almost all the time, and into the run. I would like to keep about 20 adult chickens at all times. I only have the materials to build an 8x8 coop. The run should be of a good size. So I am wondering if this is do able, I will not keep an aggresive chicken. And the coop will only be used for them to sleep at night, and lay eggs in, as well as protection if I have a series of predator attacks, and have to close them up for a couple days. So is this scenario do able?