Assuming that the DS depictions of ghosts are accurate, then I would certainly not move into a house inhabited by a bad ghost. The most likely outcome would seem to be, at the very least, your children get possessed. It's also likely that the ghost will eventually force everyone out/destroy the house.
On the other hand, if it was a good ghost, I would pay extra money to live in that house. Good ghosts are known for saving your life from time to time, testifying at trials when you really need them to, and warning you of imminent danger.