Well, to get into bees, you'd need a pastel and a spider. Or you can just outright buy a bee for about $400...

Really, figure out what morphs you want to work with and decide how you want to do it. Do you want to start with babies and raise them up to breeding size, or are you looking to pick up breeder size snakes to put together next season? Are you looking to buy single gene morphs and breed them over several seasons to produce the multi-gene combos yourself? Or are you looking to pick up some dual or multi-gene snakes to make higher end combos?