Sounds Good.
long as you have the space to house all of them you're ok with the group your thinking of.You've got a few more years to iron the plan out. I would say just think ;would you be able to handle a 'best case scenario' say all your females lay 10 egg clutches, would you be able to handle all the babies and house them and feed them etc?
And contrary to the beliefs of some, ball pythons tolerate inbreeding, all founding morphs in the hobby were initially proven thru means of inbreeding. usually son to mother or father to daughter, or sib x sib. I believe inbreeding is ok long as its not done for several generations down with no outcrossing.
You could also try to look for multi gene males, I see you want , pinstripes, lessers, fires and bees, you could look into a bumblebee het hypo male, and kingpin, or maybe a firefly.
Also even that little group of snakes you listed would cost more than 1500, the female group alone.