OP, how stressful for you. I'm glad it's more or less sorted, apart from her getting home, which you seem to have made arrangements for too.
I did all this shit in my 50s!!!!! Seriously, I arranged to meet a complete stranger, miles from home, and agreed to spend the weekend in his house.
Family tried to point out how mad/dangerous this was, but all I heard was "You don't trust my judgment, you all think I'm stupid and naive, and I know enough about him to feel confident about my decision, so fuck you."
Your teenage daughter is probably more mature, I'm only sharing this in case it helps illuminate her perspective.
In my case I went to visit him for the weekend as planned, found him weird but perfectly pleasant, had sex with him as I didn't know how to get out of it in the circumstances, and learned my lesson.
What I'm trying to say is, on the plus side, I was right about judging character. He was completely pleasant and harmless! On the other hand, family were right that you shouldn't put yourself in this kind of situation. Luckily your daughter is clsoe at hand and you have things covered. Well done. 