I don't breed BPs but I do plan to breed some of my other species starting this year. I think it holds true for pretty much any species of exotic that you don't make money breeding until you've really put your time in and know what you're doing. You've got to really love the animals to get to that point.
Talking about respectable breeders here, not random people who churn out a bunch of low-quality animals as cheap as they can.