Not sure about the paint. As long as it is non-toxic when completely dry you should be alright. Just be careful if it starts to peel . . .

What do you mean by vinyl rug? Is it just a mat or plastic carpet (type)? You will have a lot of moisture from misting etc and the smoother & easier to clean the bottom is the better.

The size of the cage should be fine. I started 5 month olds in 2x2x3 with no problems.

10.0 bulb is good. You need at least an 8.0 for that height of cage. I really like the Reptisuns and you can get them online for around $20-$25. Just remember that a UVB bulb will still produce light even after the UV is gone. Keep track of the months in use.

You may find keepers who have had luck with the Habbamist but I have not heard anything good about them. You might want to save your $. (In case you decide to get more chameleons so you can get a comercial mister . . .)

Plants & vines sound good. The more live plants the easier to keep humidity in the cage.

I have heard both good & bad about bird cages and I have never used them. Although you are planning on using worms as the main diet I would also suggest adding more variety if you can.

Jim