Farmer Brown, I love the coop! In fact, your coop is somewhat close to the design I have, but uses a thought I was thinking about after I built it. After I had made mine, I had thought that it might of been better to build a "fenced box" and use lighter weight walls like you did to keep the expense down and to keep it lighter. Bravo, I love the way your coop came out. One thought for others, is that to make building easy, you could buy a "cheep" (sorry, I had to) screen door, remove the screening, and attach hardware cloth to the inside.
Did you build anything larger than the small clean out door to access the inside of the coop? Any photos of your roost set up? Do you rely on the run side vent for air flow only, or did you also use eve/ridge venting?