In anything with selective breeding, be it horses, cows, dogs, or even snakes, the proven way to maximize the number of high quality offspring produced and minimize both total costs and below-average-quality offspring is with a super high-quality stud male paired with multiple females (as high quality as you are then able to find).
This is why for more common morphs, females are generally more expensive, and for the rarest morphs, males take the cake in price.