What is the average household exactly? One of my neighbors are baby boomers whose 30-year-old daughter still lives with them. They have four cars (two for the

What is the average household exactly? One of my neighbors are baby boomers whose 30-year-old daughter still lives with them. They have four cars (two for the dad, one for the mom, one for the daughter). Across the street is some kind of flophouse -- a 2-bed 1-bath house, whose occupants have no less than 7 cars. It causes no end of consternation for my wife and I who have merely one car each, and we often can't park in front of our own house because the neighbors are taking up all the spots.