If you're an only kid it's still 3 people splitting rent instead of 2. If you have a large family and they're all pitching in, it could be even lower. Deposit

If you're an only kid it's still 3 people splitting rent instead of 2. If you have a large family and they're all pitching in, it could be even lower. Deposits to move out, needing a bigger emergency fund, you have to go grocery shopping/chores all on your own instead of splitting them with others. Time is money. On top of all this, most people I know in the early 20's are shit at money management, so they can't save up.