Bumblebees are the result of a Pastel x Spider breeding. Killer Bees are Bumble Bees bred back to a Pastel. If your new to breeding i wouldn't be focusing on Ablinos or any recessive traits for that matter, unless you can afford a female albino. Or a large female het albino that won't yield to many albinos anyways.
I'm not sure how experienced you are, but incase you didn't know Ball Pythons produce very small quantities of young. Thats why recessive traits are bad to start with. Ball pythons lay anywhere from 1 (minimum) to 16 (maximum/very rare) eggs per clucth. It is more common to have a 4-8 egg clutch and thats from a decent sized adult.
I would shoot for the Bumblebees, all the way. Buy a male spider (you might be able to get a 2006 ready by next season but a 2005 Spider would be much better) And get a female pastel thats at least 800 grams (or the biggest you can find-your going to need a female around 1200 grams/18 months of age minimum to produce). Also try and snatch up a few normal females of breeding size because the spider gene is Dominant, results of a Spider x Normal breeding are 100% spiders. And when you look for normal females buy them as big as possible, i mean huge because large quantitiy clutches of spiders are great to have around.
Then run that male spider through all your females, this is where age/size/and experience plays a part. A male ball python will disregard his good health for a good breed. So you have to chose when hes had too much, because breeding will take a tole on your animals. Of course put more emphasis on the spider x pastel breeding. But don't forget about making all those spiders with the Spider x Normal breeding, you produce enough of them and cut some price tags and you can buy your self all the bumblebees you want. Keep in mind that its easier said then done. Both the breeding/producing and selling of the animals.
Pastels(co-dom), Mojave(co-dom), and Spiders(dom) especially are all great investmant ball morphs, if you want to eventually be able to breed albinos then work with those three morphs and youll have snakes to trade/sell towards albinos later on.
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2.2.1 Bearded Dragons
1.0.0 Lemon Pastel Ball Pythons (NERD Line)
0.0.1 Water Monitors
1.1.0 Pastel Red Tailed boa Het. for Albino
1.2.0 Yellow Ackie Monitors
And Counting...