If you are on a budget, the Champ & Mystic are probably not going to happen now. Enchi's are a great base combo and the returns are great. Enchi pastel females are like $1300 - $1500 on places like Constrictors Unlimited.

Right now you have 2 males & 1 female. My suggestion is build out your females and hold off on the males. Depending on whether you get a baby or adult it could be 2-3 years before a female is ready to breed. Why feed and spend money on a male for 2-3 years when you can wait until year 2 of the baby female to get the male. When he is ready to breed, so should she.