I don’t see Carleton, Hamilton or WF being realistic with D’s and a bunch of C’s. Even if the D’s were in gym or art class, they are there and they don’t look good. Upward trajectories are great, but unless this student is ticking some boxes those colleges need to fill, I think it’s very unlikely.
Why? Then she isn’t applying as a freshman, when the best merit awards are offered as an enticement. If state u is a strong possibility, by all means, go for it. But you seem to be focused on selective LACs. It’s a bad idea to take regular college classes. She will then be a transfer, and transfers do not get anywhere near the same kind of financial incentives.
The state you live in might be helpful, as a lot of colleges seek geographic diversity. This student could consider schools like Clark, Denison, Dickinson, Gettysburg, maybe F & M, Ithaca, Muhlenberg, Marist, and similar to have a better shot at receiving good merit aid. I think Whitman in Washington state is worth a shot. Maybe Connecticut College, Skidmore, Oberlin, or Union as reaches.
I personally think your attention should be focused on colelges from these two lists: