Well, the good thing about racks, cages, and other such supplies is that they're reusable.
But (and take my opinion with a grain of salt because I do not breed) I would imagine it would be a hard market to break into for ball pythons because the market is so so saturated. I mean look at morphmarket, you'd spend days looking through all the ball pythons.
If I was going to get into breeding, I would lean towards more rarely bred snakes, but with a balance of available information, so you don't need to waste too much time (and money) figuring things out.