You've gotten some good advice and people have different thoughts so soak it all in. I don't know how much experience you have, if any, in breeding ball pythons so advice is difficult since we all are in different situations. If you are pretty new to this I would suggest you consider spreading the investment over a few years. For example, a nice start may be a good rack system and equipment and maybe some combo females. Then spend on more animals in subsequent years. I think you will learn along the way and possibly avoid some mistakes that you would of made if you spent all your money up front. Someone on this forum once said something like "to run a business you have to think of it like a business and not like a hobby". It is good advice...