Hi there....wow, so you're going to get a chameleon ? Will it be a veiled ? I highly recommend them, and get a male if you do, very beautiful and you don't need to worry about a nesting box. Without a nest box females become egg bound. You can even tell a male when it's tiny, they have a tiny heel spur [ like a nub ] on their back feet. Be sure to look for that ! Whatever you do, don't buy a Senegal cham., those are wild caught and don't do well. So anyway,that looks like a nice enclosure, I see screen at the top, is the door screened as well ? if not, you will need to either drill a lot of holes in it, or replace the door with a screened one, or even replace a wall with screen. It's best for them to have pretty good airflow. No loose substrate for a cham., they will get stuff on their tongue while hunting and that would be trouble. Newspaper works fine, you can put several layers down in sections that can be taken out as needed every day as it gets wet and soiled. If you paint it be sure to use non toxic, and let it dry 100 % completely, very important. For water a dripper is fine, just place a flat plastic lid of some sort on the bottom of the cage to catch most of the water that drips, but nothing even more than an inch deep , if you have a baby it could drown in it.[ that's just a precaution and not likely to happen ] You can also use a spray bottle once a day to spray the entire chameleon, that helps them shed and cleans their eyes.