The thing I always recommend is that people get a good understanding of the genetics of the animal they're going to breed, especially with reptiles/amphibians. Even if you breed healthy reptiles, you're going to want to sell them. Problem is a lot of traits that look lovely on their own just turn out looking kind of 'blah' when you mix them together. I can't tell you how many people I've seen breed very pretty snakes together and end up with babies they pretty much have to give away for free (or like 10 for$5), and most end up being used as feeders or going to people who just don't care because they're so cheap...