Great looking display. It will look like high quality furniture when you're done.

Couple comments, make certain to seal all wood inside so it can be sanitized. There's several options for sealing or coating it, I'm sure you know a bunch.

The holes drilled would pobably be too much ventilation for a ball python that needs more humidity. Properly kept, balls shouldn't need a misting system either, without a screen top letting out all the humidity. You'd want to build, then test the humidity before you drill any vent holes. After all, you can always drill more!

The lighting needs to be completely enclosed so your animals don't climb up between the unit and the "roof" OR wind up on a bulb and break it. The silly critters do the weirdest things given opportunity.

Make certain everything airs out thoroughly before putting any critters into it.

When that is done, you'll be the envy of the site with such a awesome display piece. I can't wait to see it! Could you post 'in-progress' shots of how it's built and such too maybe? I love to se things being built!