Looks good. Only problem is that I don't see any real hides. The only thing I see is the log arch thing, and that isn't a proper hide. A BP likes to be just a bit smaller than the hide, and be enclosed in it. A log hide won't make it feel secure.

As for humidity, try covering the entire tank with plex and put two screened 1.5" holes, one on each side. This will retain more humidity while still permitting airflow. If you want you could also use some sort of cloth on top of the screen. If you do this you may have to turn down the humidifier though.