You are on the right path. A good idea is to get normal temp and humidity readings in the room so you know what to adjust. I like seeing people make the effort. Sometimes it can get overwhelming, especially if somebody gets a chameleon and is given improper info. I also have a site with a lot of good beginner info. Stay at it and don't panic. he looks very good so take a minuet to gather your thoughts as to where your money is best spent first. This is a very individual thing. Ask around for plant cuttings and grow your own. Maybe some one has an AC you could pick up cheap. You will need these things but you don't need to rush out and spend a fortune. I would priorities proper UVB lighting. This can cause harm even in a relatively short period of time just a few months depending on how they were kept prior, maybe even less if they have already been under poor lighting.