As a single person (no pets, either), I have about 2500 sq. ft., plus a two car attached garage, and a full basement. I think I would be comfortable with as little as 1300 sq. ft. of finished living space, a two car garage (preferably attached), and at least a partial basement. But when I look at possibly relocating to a home like that in my LCOL area, I'm not seeing much of a savings to me in home prices or property taxes for a nice smaller home in a decent neighborhood like the neighborhood I currently live in. If the savings aren't significant by downsizing to a nice smaller home in a decent neighborhood, I would just as well have around 2000 sq. ft. 3000 sq. ft. is getting excessive, though. And I don't want to live in a crappy house or bad neighborhood (crime, noise, etc) just to save a little money.