BEL's are still pretty popular! I'd personally get a mojave female for my super lesser male, if I ever got into breeding him.
Like everyone always says, keep in mind that you won't be *earning* money by breeding, especially just starting out- there are already a ton of hobby breeders out there advertising and trying to sell their snakes, and it's hard to compete with the big name breeders who are already breeding hundreds of BP's.
You will technically still be "losing" money, just make up for some of what you invested in your efforts, and break even at best. Breeding BP's would really just be spending some money to pursue this personal enjoyment and how fascinating the whole thing is.
Don't forget to ask yourself f you are capable and prepared to keep and feed all of the hatchlings during the time that they don't sell yet, which may take months.
Choose the morphs that you personally enjoy, because that's what makes it the most fulfilling and worthwhile in the end. =)