_The_ least expensive way - in terms of initial cash outlay - to make a leucistic would probably be to start with a male of your chosen morph (Mojave would be least expensive, I think) and a female normal. Breed the morph male to the female, and hold back any female morph babies. Two or three years down the line, you'll have the opportunity to breed the sire back to one of his daughters, and produce a leucistic or two.

It's the "cheapest" way to get started, but it'll take some time before you hatch a snake the color of its egg.

~Bruce