Your coop is awesome!
I will say, you definitely want to get something stronger than chicken wire (the hexagon style). As others have said, it does a good job of keeping chickens in, but predators out-not so much. Also we built our coop with the hexagon wire and with square galvanized wire. The cheap hexagon wire is already rusting and we built it this past spring! So in the long run, you would probably be saving money getting galvanized wire because you won't have to replace it as often
Predators of all kinds have gotten in the parts covered with chicken wire but not the galvanized wire (not yet anyway)!