Not all females get that big and not all males get that large either, 9' bci females arent common. I have a 6 year old male that took forever to break 5', and I have a 6 year old female that is only 6'. Not saying there aren't larger bci just saying its not as common as most people here think. If your looking for a garbage can for excess feeders, a boa might not be the best choice. Their digestive system isn't as fast as a burm or retic. You could put those excess feeders in the freezer and feed as needed, or find somebody local to sell some of the excess to. Boas are opportunistic feeders in the wild and are over fed and and made obese too often in captivity. Don't take this the wrong way, just trying to help you with your decision lol.