Well as far as how much to bring to spend on a ball python, it really depends on what you're going to buy and what the prices are. If you're going to buy a pastel, and pastels are priced around $100-$200 heavily depending on quality, you could bring $200 and tell yourself that it's for a pastel and only a pastel. I'm not sure about the other stuff. You should look online for prices on the supplies you're possibly going to buy, then add it up and bring a little bit more than that to be prepared. From what I've seen, prices are about the same.