A word of advice,
I jumped into the world of reptile breeding and buisness way too fast a couple years ago. It's much easier said then done, and a lot of people don't tell you the hard side of things. I invested thousands of dollars and 20+ crested geckos in the beginning. I have since branched out into various snakes and chameleons. However there is no guarantee that things are going to work out well. I've had up to 40 eggs laid, and haven't hatched a single gecko, i'm still learning the tricks of incubation. Not only that, but i've had females accidentally killed by males, or have a hard time laying and pass away. Sometimes you luck in, and sometimes you luck out. I've lost unimaginable amounts of money and if I wasn't totally passionate about reptiles I would have abandoned ship. Caging and food costs are a whole different story. To make up for the food bills i've taken to selling feeders as well to pay for my own cost.
However it is all a learning experience, and I wouldn't expect to make much for the first 5 years if you start with a young animal that needs to reach a certain age to breed. Its crazy, stressful, but amazing and fun if you do have the passion for it. My advice, the only way to make money is to have a large number of animals, but you run a greater risk of problems with a bigger amount. Start with a few key individuals, learn you way from those couple, then once you have learned more, grow more with it.