Don't worry (yet) about sticker prices! If your daughter is admitted, you never know what scholarships come out, and she could end up paying 100% or 0% of the price.
On a practical note, if your daughter were accepted to a T10 school, she would most likely compete in job recruiting as if she was an undergrad. Instead of interviewing for MBA-level associate consulting positions, she would interview for an undergrad-level analyst position instead (which comes with a decent salary, but half of the MBA one.) Almost every job listing on the Ross board requires work experience, 2 years being the smallest I've seen, 4 years being the most common.
Considering she has a great GPA/GMAT already, perhaps she could start applying for some jobs in business. Consulting is one in particular that doesn't care too much about her major.
I don't know if she's open to law given her interests or the state of it, but as a matter of comparison, a very high undergrad paired with a high LSAT would definitely grant her admission to many elite law schools where she would not be fighting an uphill battle relative to her classmates. So yeah, compare various graduate programs, because the MBA is not favorable for super-recent grads.
A great piece of advice passed on to me: the MBA is one of the easiest degrees in the world that will facilitate a complete career change. Don't burn this get-of-jail-free card before you've even started playing the game.
Good luck to your daughter!
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