Well the way your coming of doesn't sound like your really looking for a hobby, It sounds like your looking for something that would turn you a profit. You revert back to the 'hobby' stance when someone checks you on your intentions. As already said you will be way in the red from basic care, housing & feeding, before your snakes even produce anything.
A person looking to have a 'hobby' doesn't show up and start asking how much money they can make left and right.
Also if the female your talking about is the one thats currently 160g,she will NOT be ready to breed next year, especially being fed mice. Females usually take at least 2 years to sexually mature before they are ready unless they are fed really well and reach a decent size in a sooner time.
You've got the next couple years to really learn and soak up information on ball python genetics and care for the ones you have now.Also please use the resources/links people are giving you as well.