Nice work Jason. That style coop really works well for small flocks. My wife's sister has one like that. They leave their birds run free in the daytime, if you keep them inside that run, I think you're going to find the grass will only last about 3 days before they have it scratched to bare dirt.
I'm a little late to this thread, but if you haven't already put the wire on your coop, be sure to use hardware cloth on the areas where the hens sleep. Don't use anything bigger than 1/2" x 1/2" openings, (I like 1/4" x 1/4"). A coon can reach through an opening the size of a quarter, and if they get ahold of a chicken, it's coming out through that hole. Trust me, this isn't fun to find and even less fun to clean up.
You'll be eating fresh eggs before you know it.
Tim