I was in a display home the other week sticky beaking.
There was a young couple excitedly showing their parents through the home they were going to build. (4 bed, 2 bath, 2 living)
One of the fathers said to the son, "Gee mate you're starting where we finished." in relation to the size of the house.
I thought this was a really interesting comment and actually very true when I think about the progression of my parents homes through out my childhood. They started in 12sq and stayed there til there were 4 kids.
Mum's house she just sold is similar size to the home my younger brother is building (28sq and his first).
Jo