Did you happen to read my first post?You should have some sort of drain in the floor like you would a laundry room. Will make an accidental spill much less worrisome.
I see Electrical has been adressed. Also look into the full plumbing for the room. See if you can tap into the hot and cold water lines in there and install a set of faucets to make cleaning your tanks easier. If possible even install a wash sink (you know the big ones in a laundry room?).
As for the floor in the room... what is it currently?
along with a 24/7 drip system..... no more need for water change.