Harvard is the best deal in town for financial aid - if you can get in! It is incredibly competitive and they can pick from many many students who have all the right grades. But if you do get in their financial aid package is brilliant.
To be absolutely honest, and I am not trying to detract from your child in any way at all, but what you describe is someone in the US who would have a wide choice of excellent colleges - but would not be regarded as a shoe-in to Harvard. The 2 children I know from my kids' years who were accepted recently were absolute straight A/honors/AP students. One was a musician who performs and has distributed and sold his own music - and formidably intelligent. The other was extraordinarily academic, the star of his private school (a traditional feeder school for harvard historically although that is pretty much gone now) soccer team which won the schools cup that year, multi-cultural, fluent in several languages, and ... his dad works in Harvard.
Also all of the US applicants would have done a lot of community service/volunteer stuff.
I am also in the US and have done college aps with one child, in the midst of it with the next and another to go. I agree with newbian that she might want to expand her list (maybe add some smaller liberal arts colleges too - Colby, Bates, Middlebury etc). If she is an attractive candidate she will get offers with financial aid (although Harvard is the easiest and one of the best to navigate in terms of financial aid).
Also you need to understand the world of "early decision" and "early action". One is binding, one is not, not all colleges do it but it can be a way to indicate to colleges your keen interest.
Basically the college thing in the US is like a tennis match. Every college from Harvard down to Nowhere College wants as many people as possible to apply. So they court you during the application process. Then, they get to pick and chose who to make an offer to. At this point they want you to accept their offer - this is their "yield" and matters to their stats. So they want to have a gazillion people applying. They want to make offers to only 10 percent of the gazillion (makes them look highly attractive/competitive) and then they want almost all of that 10 percent to accept. Early decision/action is a way of saying "i will make your yield look good"
Personally I think the US four-year liberal arts degree is the best thing in education and a fabulous opportunity for a kid eager to be educated.