I agree with transfer. We don’t know the student’s need situation though. We do know, to them, it’s not affordable and we can likely find lower cost opportunities, at schools that meet need for transfer if they deem the level of need at a level that will help the student or at schools that have lower tuition than OP pays - if they’d share that info.
If OP plans to ride out AU regardless, that’s a choice they and the family will make and I imagine will have increased parental loans and stress on the day to day life.