Be prepared for some hard work. My wife wanted a second Staff . I gave in so we have a dog and a bitch. Its hard work. Walks are the hard bit getting dragged about. And you need to keep the separate at night. Although they may be the best of friends it doesn’t take much for them to do serious damage to each other.
A lad I worked with had 2 bitches one morning he got up to find one of them had killed the other and he had not even heard a thing. Although every one who has them knows they are lovely dog, they were breed for fighting.