The schedule proposal sounds good and your D12 will have others her age around her. I know she's not going to like it because she's not going to be in her safe little world, but she's got to do this in order to have a balanced life and routine not, just now, but in the future too. This will be a good way for her to meet people her own age too. She may be pleasantly surprised that the kids have the same interests that she has.
Okay, so your D20 has asked if you want her to stay around and help out next semester. What changed? Doesn't she already have a deposit down on a place to live next semester? If she opts to stay at home, will she lose that deposit? I think I would put this one back into her court. She's old enough to make this decision for herself. If you ask her to stay, when she's angry, she'll throw it up into your face and resent you and D12 for her feeling guilty and offering to stay at home. Put this question back into her court. It's her decision to make.
