I don't know anything about modding Oblivion, but from a user's standpoint I can say this is a very interesting idea. It would certainly add a lot of flexibility into the game as far as where you put your feet up and call home. :foodndrink: But it also
seems like it would be a very difficult thing to do, but I'm only going on intuition there. Anything can be done with time and effort, though!
One question: Have you thought about whether or not buying the house will be handled differently if the
player murdered the NPC? That's another thing I don't know how to handle, but something to think about - do you want a person to be able to hack their way into the opportunity of a new home, or would you prefer it to require them to be sneaky? As in, they only have the option of making the purchase if no one saw them commit the crime.