Ok i will explain it now so if it doesnt work i wont waste my time..
I am going to have a room for my herps, 8 meters long by 4 meters wide. Along the back wall where there are no windows so i am going to put 8 cages which measure 1800mmH x 1000mmL x 1000mmW. Before i concrete the room i am going to have a plumber fit all the pipes for drains, and in the middle of each cage i am going to have a drain so i can take a hose inside of the cage out and disinfectant them and rinse them down. That way the water will go away and i wont have to bucket it out. For bedding i am going to use mulch. The front of the cages are going to be a glass door. The cages are banked next to each other with no gaps so i have to work out what i am going to use what is water proof (i was thinking melamine but its going to be a display room, so i want something nice). On top of the cages sits a custom made fly screen. I am adding a box ontop so the cages will really measure 2200mmH to allow for space between the fly mesh and heat lamps. Inside the box i am going to have all the uvb tubes and heat lights (i am using uvb lights as they provide better viewing).