The WKLO Radio station house look nicely done and I like the tall Bill Board attached. Wait a minute I believe I see after looking at it again that's part of the signal antenna system!!
it really adds realism. Will this module become part of the layout? The only thing I see, and it's minor is that the Left back corner is raised up it appears by a stone or rock outcroping. If that was chiseled away slightly to allow the build wall to sit down a bit more that would a real nice effect.
Of course you could also fill in under the wall with a little real dirt to bring up the ground level.