Breeding any animal isnt profitable....
OK, here is my two cents. I breed leopard geckos, bearded dragons and next year will be crested geckos as well (if my female is up to breeding weight).
Breeding anything, you will not even break even. Many breeders of all kinds of animals do not break even and end up bankrupt. The first five years of a breeding venture are the most crucial and difficult.
I'll do an example with leopard geckos, since I know them the best. You need to buy a quality pair of leopard geckos. Which morph you get depends on how much you'll be spending. Breeding leopard geckos is not like breeding bettas, there are SO MANY genetics in leopard geckos and there are many "rules" regarding these genetics (don't mix the albino strains - yes, there is more than one- for example). You need a minimum of 2 tanks, to quarantine the leos away from each other, and then separate them after breeding takes place. Contrary to popular belief, leopard geckos SHOULD NOT BE HOUSED TOGETHER. You need to have money put aside for vet bills as the female can have many problems during the breeding period. For example, my blizzard female became eggbound, despite doing everything she needed. Just going to the vet to CONFIRM its eggbinding costs $90.00, that is not including the surgery and medications afterwards. And that surgery is a risky procedure. You need to have under tank heating. NOT OVERHEAD. Which can run anywhere from $50 to closer to $100. You need a separate, heated enclosure for every baby. And leopard geckos hatch 2 eggs per clutch, with up to and sometimes over 10 clutches a year. Leopard geckos can store sperm, so even if you only allow them to mate once, they can still produce eggs months after copulation.
That is not including the hundreds of dollars in live foods. Leopard geckos NEED live foods.
It works out to be A LOT of money. You won't break even. You'll be far from it; FAR FAR from it. And that goes with any animal. Even getting things second hand only saves so much money.
You should never ever buy an animal with the only intention of breeding. I think that is just cruel. I decided to breed these animals after I'd had them for a year. During that time I did A LOT of research. I'm a member of several forums. I also have a breeding mentor, who I can call, e-mail and hang out with whenever I want. She has proven to be invaluable to me, helping me through everything step by step. I think you should own an animal for at least a year before considering to breed them; you need experience. I also believe you should be experienced in raising these animals already, that way you KNOW how to handle the animal at every stage of its life. I bought adult leopard geckos and baby leopard geckos before breeding so that I could understand the differences in their care, and how different it is in handling them and taming them.
You also need to look at the possibility that you won't sell all these animals; what are you going to do with them? If you are in a tight position money wise already, how are you going to afford to feed the mouths of the animals that DON'T sell.
And what about culling? Culling a reptile is a LOT different than culling a fish. Do you know a common way of culling a reptile? Smashing it over the head with a brick. I'm completely serious. Will you have the stomach to do that? Because you WILL face that situation. Paying a vet to put down every animal that needs to be culled will not be an option.
Also, no offense to everyone on here, but the majority of the people who are answering this thread won't be buying your animals so their opinions shouldn't really matter. You need to ask the people in YOUR area what is the most popular and which of these they would most like to buy. What is popular in the US may not be popular here in Canada.
I say if you are looking to earn more money, get a job. Breeding animals is purely for fun and improving the species. Its not about making money.