If she likes biology that might be her best option, given she is open to graduate school. Once she is in college she will have time to explore.
I would focus on finding a school she likes at a price that works for your family. If she comes to the realization that she loves nursing, she/you can plan accordingly. Nurses can do well financially, but it is really a calling (imo) and is not for everybody.
One of my kids was a biology major - if you have any questions.