Well don’t forget we can use the bottom set of teeth and use them in different combinations too.
Their will be no more than six families of Vampires. There could be more added on later on, but I think that will be enough for now. Some families may only have one tooth, whilst more powerful ones could have upto three. They would fight and kill each other over them.
With your idea, with your house being more wild, they could also be the lords of the Vermin and have command over all lower wild creatures, such as rats, cockroaches, bats and have a poisonous bite too?