OP if you are a Questbridge scholar your best financial aid would probably be need-based.
For our kids I ran net prcie calcs for many schools on your list and Sarah Lawrence was not feasible for us, either. Bryn Mawr and Trinity were (never looked into U Richmond). As stated in post #11 it is time to get onto email to argue your case. Approach it as a future attorney 
Maybe it is not too late to get the guidance c ounselor on your side. Another case of good -practice for an aspiring lawyer.
It is fortunate that you have two good options, and from other posters with experience it sounds like Wilmington is the better one. You can be proud of yourself that you covered your bases.
I would hesitate about going into it plannign to transfer if your financial need is significant because transfers often receive less aid, formulated according to different criteria (next time you run a net calc, notice that they usually ask you to specify at the get-go :first-year" or “transfer” before the questions).
My suggestion: 1) learn to love Wilmington 2) in the meantime, reach out to the waitlist schools – assuming you would be able to afford them…3) wait 4) attend Accepted Students Events at Wilmington 5) if you have not heard definitively by then, put down a deposit for Wilmington by May 1st 6) wait again to see if your wait list schools have a space for you after May 1st when they get their deposits 7) if you really cannot get into the idea of Wilmington, withdraw as soon as you make the decision and take a gap year.
Others may object to your making a deposit at Wilmington if you really don’t intend to attend, and they have a point – another student may want that space, just as you want one somewhere else…as soon as you really do decide, let them know one way or the other.