Since you are able to let them out they will surely find some sun anyway.
LOL I have to laugh a bit. My hubby was not to thrilled when I wanted to take out the 5 coops and make one large one. I ended up making all the walls prefab in my shop and he helped tear down the old and set the new. I in...
Chicken wire will keep hawks out. At least it does here. I am not sure on possum as we don't have those where I live.
I would be surprised if there were not stealth raccoon there. I know they are here even though I am in the middle of town. My dog actually treed a mama coon and 2 kits a couple...
Interesting space. I agree it seems a bit dark in the pictures.
One thing I know from my own flock is that they like to sunbathe in the morning. I think that it would make a great coop with some mods if you were able to make the entire area the coop and make the run coming off the gated end...