[carolina yorkie]

I posted this here because I figured you guys mught know the most about this issue. If it is in the wrong place, I am sorry, and please move it around.
I have a female yorkie that is almost 3 and is the love of my life, however, she is lonely. She has been around other dogs her entire life with the exception of the time since I got her back in November. She doens't act like a dog, more like a little person. She doesn't know how to play with toys, just her chew bones. I want to get her a playmate as I think it would do her good. She had two litters before coming to me and I have been offered the father as his owners cannot keep him and he is living with a friend of theirs. Here's where the questions and concerns lie...

He will be 4 in April. He has never really been housetrained. He has been a stud, for a while. He is currently living with a breeder that has a building out back for her pups...ugh...and he goes in the house and out. Can I ever train him to be a good boy and not mark all of my furniture and my house?? If he comes here he will be promptly neutered, but will that help this late in the game? I know he would be good company for Jolene, but is he the RIGHT company? I really, really, really want him out of that situation, but not at the expense of my hubby killing me for bringing in a 3 lb marking machine into out brand new house?

Please help...