I'm looking for (or requesting) a mod that allows me to buy a secondary house in my neighbourhood, kind of like you do when on a vacation and you purchase a vacation home, but instead this would be buying a 'vacation' home in your current neighbourhood, still allowing you to live in both houses at the same time..
I've got no idea how complex this is, I think I heard of one once, but can't find it.. soo.. Help? Thanks.

Edit: This is for TS3.