Especially if grad or professional school is in the future, please avoid loans. Having a lot of loans(and it seems like you could have $100,000 or so over the four years at Michigan, right?) will not be good.
The rule of thumb about loans is the total should not exceed what your starting salary will be. In either of these fields, I doubt that she will earn $100,000 after her bachelors.
Michigan is a wonderful school. And I would say go for it….if you didn’t need to take loans to do so.
Illinois is also a great flagship research university. Congratulations on getting a great scholarship there.