1000 (child) + 3000 (teen) + 3000 (YA) = 7000 (required to move out)
In others words, is it 7000 points total, regardless of the life stage in which they were acquired?
Not being picky but just wanted to point this out incase it confuses someone.
It's 4000 (YA), not 3000.
1000 - child, can age up.
get another 2000 which adds up to 3000 - teen, can age up.
get another 4000 which adds up to 7000 - YA, can move out.