Since most students are 18 or over-adults-if they refused to budge because they are adults, I’d play dirty-if they insist on staying, they will do it without any further financial assistance from home-not to pay for dorm, books, tuition, food-and if the car they are driving is not in their name, I insist on having that back in my driveway, ahorita...
A bit harsh, but I know from experience that it only needs to be done once, and produces the desired results as soon as hunger sets in on an empty bank account...
When my oldest was at Baylor, she couldn’t get into the dorm as a Freshman, so was granted permission to live in an apartment. She was OK, but her roommate was a wild child.
I told her that, since I was within driving distance, I might show up (unannounced) at any time. I only had to do it once. As it happened, I encountered her walking down the street, and I pulled over and picked her up. We had a wonderful afternoon, and we sent shopping for a new dress for homecoming.
My other children took note and always expected either me, or my husband, to drop in for a surprise campus visit.
Once was enough, and it lasted through 4 kids. LOL.