x2 on something other than chicken wire, or at the very least supplement it with hardware cloth on the bottom few feet.
EDIT: NEVERMIND... I just read your other post. Though I will say if you have a rodent issue, the chain link and chicken wire will not keep out mice and likely rats.
I assume you're going with an external nest box to maximize coop space? Roost could sit directly across from the hinged access door or across the back perpendicular, depends on where you're putting the pop door and such.
What plans do you have for ventilation inside the coop? I see 2 solid walls but there's plenty of opportunity to put some in the other 2 walls.