Don't fight tooth and nail to get her to stay.
Don't pack for her, either.
Your only real angle is that you paid for her classes, and I would tell her that if she drops out of those classes that you just shelled out a grand for, she will owe you for them. As far as your reasons why she should not move out...you can do nothing to stop her. She will have to learn on her own.
Her car...did SHE pay for it? If so, then definitely get it out of your name. And take if off your insurance.
If she did NOT pay for it, take the car away from her. Tell her that the car is for her to go to and from school and work while she is living responsibly under your roof, no arguments.
This is detaching, and it bites the big one. You have to let her go. You can't stop her. And the harder you fight, the farther she will run.
((((hugs))))
