looks good to me. that should work until the snake is about 2 feet. then you should start thinkin about a bigger cage.
maybe a rock in the waterbowl to make it a little heavier.
what do you plan to use to monitor temps? you def. need something to stick in there for humidity. a temp. gun would also be a good idea. (tempgun.com). also, you may want to use a little something to prop the cage up so the heat tape can get some air flow. otherwise it might overheat.
good luck with you new bp! whenever you get it.