I went "on tour" with a HS music group summer before senior year, and while I had a great time, and was such a 'goodie-two-shoes" that I did not drink whilst most everyone else did, I wish I had spent more time stateside learning about where I was going so that I could absorb even more!
I took lots of photos, and did tours, but I had no clue of the historical and cultural and even religious significance that I was experiencing.
There is a saying that youth is wasted on the young. If your DD does some prep work beforehand, she will not waste this time. Ten days is not a study abroad, but she can make memories that will last a life time.
If she can pitch in on costs (even sign a contract for house chores, payment plans, grades, whatever) I agree with others that she should go.
She will make of it what is valuable to her, if she "earns" it by preparing.
I wish her well!