I live in North Carolina, so it doesn't have too much of temperature extremes, but rain is bad and we have those dreaded oposumms. I am wanting to build my three babies a good coop. I have a Dominique, a Delaware, and a (please correct me if I spelled it wrong) Americauna. They are all 6 weeks. All are hens too, I bought them from a breeder in Harnett county. Right now they are in a chicken tractor that is 8x4, but it's a triangle shape, limiting their space and it's only 2 foot at the peak SOOOO... I want to build them a 8'x4'x4' coop. I want it raised about 1 foot off the ground to avoid flooding, we live in a ditch about 10 foot from a swamplan (yay us lol). Besides that, I'm an open book. I looked at all the coops on BYC, and wow, they are great. I'm looking to spend LESS than 150. I was going to use their tractor as the roof, saving some money. I really need to know if treated plywood makes good wood for the floor, roof, and sides. Also, I know it's a little ways away, but how big do I need to build nest boxes. I'll try to get pics of my babies soon.