Investing in ball pythons (since this is posted in the ball python section of this forum) is all about patience, the patience to raise your females up to the proper weight (this can take two to three years), letting your males become mature enough, providing individual housing for each one, feeding for that time, and all that to have clutches that are generally on average 10 eggs or less per female (sometimes more).
There's nothing fast about returning your money on ball pythons when you are starting out. You definitely need to have a love for working with these animals.