A very slight digression: do NOT let them get a roomate and have both names on the lease. Let your child get his own place, either you or his name on the lease, doesn't matter. It really sounds good to let a couple or 3 of them share expenses but it may not work out like that. IF both names are on the lease or the bills and one person doesn't pay his half, the other is responsible for the entire bill!!
At least 4 different parents told me not to let DS do the roomate thing. I didn't listen. We aren't wealthy people, but not poor enough to get outright grants , just loans for college, so the whole family is on a careful budget to get thru college. Sharing expenses sounded like a great idea. DS and a guy who had been in a frat with him wanted to rent a house when they both left the frat. I thought roomate is actually a 2 years ahead of DS in school, good student, very ambitious, scholarships, had plenty of personal money (this should have tipped me off) seemed OK to let them do it.
Well folks, roomie was very good at being a con artist. Not only didn't pay his half of rent & utilities for several months, actually took DS half of the money to "go pay the water bill" and didn't pay it. His car and furniture had been bought on credit and he got behind. Even picked up his scholarship money and then dropped out of school. I found out when landlord called me about back rent. I tracked down DS and found he was in a panic, water had been shut off, collection agency had been by the house looking for the roomie, DS was afraid to call home and tell us, was trying to work extra hours to make up the money (and ruining grades in the process). Upshot was he dropped out of college for 2 semesters to catch up on the back bills, I put out a fair amount of money to keep his credit from being ruined and the whole thing was a mess.
On the up side, he learned some valuable lessons about trusting people, he took responsibility and got the problems taken care of (though I wished he'd called home for help sooner before it got so out of control) and is now back in college full time with a teeny apartment that he and we can handle just fine without a roomate.
My advice: don't go there!!!