I just hope he is careful who he goes too, which I think is unlikely. Don't know if it the same over there but can just imagine the idiots who would go for a free staffy here.
He's a good looking dog, it sounds like the owners are a bit out of their depth tbh. They are offering toys etc so that usually makes me think they are caring but possibly in a naive way.
Also unless they are working dogs I like pets to live indoors so he would have to get used to that aswell.