Why are females more valuable?

[shadow reaper]

You can use the males multiple times per breeding season so you could have less males and breed each to multiple females.

I know next to nothing about the details of snake breeding, but this holds true for breeding all animals. If you have one female, you get one litter/clutch/baby/etc., no matter how many males you have. If you have five females, you get 5 litters/clutches/babies/etc., even if you only have one male. Hence why females are more valuable.