But the net-net is that you have no financial need. This is why you did not get any additional monies.
Once again, if BU is unaffordable, then you have to pick the option where your D can go for free. BU is not going to entertain the full ride from your state school when their scholarship is more than the cost of attendance at your state school.
How much can you afford to pay? Have you spoken with your D about getting a part time job now, working through the summer and taking out her max student loan?
If she is not amenable to helping you pay for this, then she has to attend where you can afford because BU has covered your tuition, they are not going to cover your room and board. You have no real basis for them to entertain an appeal.