I like your creativity and how you are creating your own personal look, it does look pretty cool. They are pretty tall for ball pythons, I would think they would be better for an arboreal snake and you could add some really cool branching across each level to make for a really cool display. Maybe something to consider in the future.
My main concern is a few design flaws. The biggest problem imo is what Sully mentioned about the bottoms of the enclosures. If you don't add a lip in front and seal them all the way around you are going to have a serious fluid leaking problem. Piss and tipped water bowls are going to be a nightmare, it will be a mess! It shouldn't be hard to fix but don't put snakes in them until it is because all its going to take is one piss and it's going to seep in anywhere that isn't sealed making it near impossible to clean and get rid of the smell. You could probably get away with the heat mat in the enclosure but I wouldn't do it. It will be a pain for cleaning. I know some of them are sealed and made for that but the snake will have direct contact so you increase your chances of the snake getting burned. A thermostat is a must either way but you absolutely have to have one with a probe attached directly to the heat mat if it is in the enclosure! Keeping the probe on it inside the cage will be another issue because the snake will be knocking it lose, making it a higher chance of burn again. I would try looking into a different heating method, the heat mat in the enclosure is going to cause more issues than it's worth. The other issue is the swinging doors. Do you have a way to firmly secure them? You need to or your going to have a snake escape. Make sure you get these things sorted out before you try keeping the snakes in there.
Otherwise, cool looking enclosure.