You're going to need a rack and a good thermostat to breed. A good breeding setup will cost you a couple hundred so if you're on a budget don't forget about everything you will need - it adds up!

Bumblebee male + 2 normals and 1 pastel female - should get you started nicely.

If you are going to breed the snakes make sure you pick up nice specimines. I just ended up trading one of my snakes because i decided i dind't want to produce below average offspring.

Nice bumblebee male ($700)
2 Normal females ($200)
1 Pastel ($500)
=$1400

If you dont have a rack and t-stat - add about $400 to that