I'll tell you about the neighbors pot belly pig. While it was a baby, it was a cute little thing that even I found hard to put down or ignore. As it progressively got more and more spoiled and untrained, it became very territorial and would attack anyone who it felt was in it's way or getting more attention than it was. It bit pretty damn hard. I was asked to leave after giving it the boots when it bit me. It also had tusks that became very dangerous. It learned how to use them and one day, it sliced open the lady's leg who owned it. She almost lost her foot as a result of the infection in the leg. They let me shoot the pig. It couldn't even get eaten because it ate everything it got in it's mouth. Including a pound of mothballs, and various other chemicals that never seemed to hurt it other than making it crap all over their house with severe diarrhea.
Since then, I've heard several other similar stories about those critters.
You might want to re-think getting yourself into that mess or keep a gun handy for the little porker.
I'm not trying to down your idea, but I'm betting you haven't spoken to many inside the house pig owners. I've been told by animal trainers that it's MANDATORY to train them and even that depends on each particular animal.
Good luck to you man. I'll keep my pork on my plate. Hahahahaha