That's pretty awesome... I'm jealous of the dedicated space that you have! I think in the distance shot, it looks fine, but some of the close-up shots things get a little washed out... Especially the one door where everything's sort of the same color.
Granted, if this was in the desert, most everything would be sand-blasted and worn to be the same bland color of... uh, sand. But I think for miniature close-ups, you may need a little more variation in color or a bit more weathering.
I really like the whole setup though, and I bet you'll get some awesome scenes out of it. The little... "things" on the walls, those little details really bring it to life.
One thing you could add, as far as weathering goes, is "grime" around the main traffic areas. Such as door handles, entryways (like where a welcome mat would go), etc. I've never been in the desert exactly, but I imagine that there'd be some rust, too? I dunno, some of our Afghanistan-deployed members will have to give you better details on that.
