It would definitely be worthwile. If you do it right, and buy your snakes from the right people, their is no reason why you cannot recoup your investment in the first breeding season. Start out with housing.. You can get a 6 drawer rack from Boaphile or Animal Plastics for probably around $350 with a cheap thermostat. You then purchase a 2003 Pastel male for anywhere up to $2000 depending on size and color, maybe alot less. Then purchase 5 normal females for maybe $500 (only captive bred). Seems high, but you really want the best girls you can get, nice, fat and healthy, hopefully over 600 grams. That leaves you with $150 for water bowls, aspen, hides, and a hovabator. If all goes well, next breeding season assume that only half the females put on the weight needed to successfully produce eggs (probably more). Lets do a low ball guess of 6 eggs each. Only 3 females producing, thats 18 eggs, 9 of which should be Pastels. Just for fun lets say you only got 6 Pastels, they were all males (females worth about double) and very average looking Pastels. You couldn't sell tham and had to dump them for $500 (probably not)each. Then maybe $25 for each normal. You still made back your investment, with a couple hundred profit from the normals. Next breeding season, you will have much heavier females, more eggs, and it will all be profit. This was a very low ball guestimate, and besides fire, sickness, or a non-sperm producing male, was just to show how easy you can regain your investment. I believe their is an add in the classifieds of someone selling a Pastel male with 5 normal females, group rate, right now....
As far as people telling you that you are in it for the wrong reasons... They really just don't know how to answer a question, and want to throw their beliefs into any topic now matter how irrelevant. From your question, I could not tell how you treat your animals or what you were in it for. I would assume that since you are on this forum, that you love Ball Pythons and want to learn about them, and if possible invest in them. You are asking qustions the same way you would as if you were going to invest in the stock market. Don't listen to the ignorant rantings and just gather as much info you can from people who have done it.
Thanks, Tom Baker