Outstanding interpretation! They'll be perfectly happy with roosts at 4ft. of the floor. We use 2"x4"s (in the winter - what you would probably consider `Spring' - they like to hang out inside and `walk the planks'). If you do build in roosts, consider building brackets on walls to slip roost `bars' down into, or hinge one end. This allows easy removal/fold-away so cleaning/maintenance is unhampered. Just some turkey packing in a generic shed (trained to go there every evening). How are you fixed for electric fencing - especially potent electric fencing? I'd rather deal with a brigade of raccoon's than a bear. Thanks for posting the shots!
We got an electric fence around the horses and the horses will be going so maybe we'll use it for the turkeys. But the three dogs are pretty good protectors too.
Ya we get a couple feet up here of snow. We,ll see how this winter goes. Hope my hens don't freeze this winter. No insulation, but i do have a community nesting box for them to keep each other warm.
What kind of low temps do you have and do you have electricity near the coop you could put a boxed in light bulb under the nesting box its amazing how much heat it puts off and might prevent frost bite.
The light bulb trick also works to keep water from freezing.
At least its much cheaper than the fancy warmer's.