Ive been keeping and raising snakes for 25 years but just started breeding ball pythons 3 years ago..The best advice I can give is take it slow..If u buy a whole slew of ball pythons,you have to consider the housing,heating and feeding requirements for multiple animals..As they grow you will have to upgrade cages/racks which is costly.food can b costly for bigger collections.Then an incubator..also when u hatch babies you have to consider their obvious requirements for their health and care...I have seen people get into this and burnout quick because they overwhelmed themselves with too many animals that they couldnt properly care for or because their motivation for breeding ball pythons was strictly for financial.gain..People that try to do this cause they wanna get rich r doomed for failure from the start.I would always advise starting with healthy babies and raising them yourself..starting with 1 male to 3 or 4 females is a good start...there r great breeders out there selling packages like that which u have already stated...Get what you like...After you have success and some experience,you can always build your collection through holding back animals and money u make from sales you can throw right back into your breeding projects...Good luck to u!!...Breeding ball pythons is very rewarding and fun but it is by no means easy..Be prepared for disappointment and be open to learning and educating yourself...If u have a passion and a love for ur animals,you will be succesfull