> And most of that will not be used 95% of the time. That's OK. Because the alternative is not having one of those spaces to begin with, or having to change a

> And most of that will not be used 95% of the time. That's OK. Because the alternative is not having one of those spaces to begin with, or having to change a space to fit the needs (i.e. friction). Specifically, how often would your parents have you over if they had a 2br apartment and had to change the function of the second bedroom (or living room) every time? And honestly, they may be OK with it. But they also may not - they rationalized the additional cost of a 4br house in the first place. > 4 persons cars That space might not be used all the time, but again the friction of having to rent a different car when you do need the space would be pretty significant. Not to mention a 4 seat car is effectively required (assuming suburban or rural US) once you have even one child.