After 2 year community college, got married the day after I turned 21. We did live with my parents for a year when we built our first house.
To echo what was said, I have told my sons, you can live here as long as needed to save money to pay off college or save to buy a place of your own, but no way are you putting your feet under my table, eating my food, having your mother do your laundry, just because you are a sorry ass.
I worked with a guy who let his son live at home, no rent, no help with utilities or groceries.
The young man had a new truck, used car, 4 wheeler, and a bass boat. I told his dad your are out of your mind letting him live there for free and buy all that shit and you and your wife have to watch your money, oh hell no.