Single parent here, no family around here, no support network.
DC is 14, very sensible. They'd go to school, I fly out at lunch time, they come back home, reheat dinner, stay overnight and go to school in the morning, I return home before they are back from school, I'd be away for about 30 hours. DC is happy with this idea, they can manage. I'm concerned about emergency situation. I badly need to go to help a close relative abroad. Can't take DC with me for a number of reasons, mainly school but also family issue which is the reason for need to travel.
Voting:
AIBU: I wouldn't leave DC alone, no matter how sensible they are.
YANBU: it's ok for DC to stay for 30h alone given desperate circumstances.