Like I told my daughter when she went to college, "no way you're doing to my money what I did to my father's"
I told my her after she had a lousy Freshman year that she would now start paying rent. Not only that, she still had her work to do around the house. And, and this was the kicker, she was not allowed a social life until she was working 40 hours per week.
I was serious and she believed me. She took an apt. with a friend and got a P-T job. She lost both of them, but has no intention of moving home. She's mooching around with friends. I'm a bit proud of her attitude. But she still doesn't get the whole 'no one cares about your excuses' part of adult life.
And if she decides she needs to move home, she faces rent, chores, and restrictions until she is working F-T. Even then, she won't be allowed to live like a disinterested boarder.