This is one case where the EFC should not be combined. NMF child will have 100% covered at UT-D or at a Florida school. The school for the second child will consider that she has a $15k EFC, not that the family has a $30k EFC.
If she gets tuition covered somewhere, they will look at the remaining costs (R&B, fees?, incidentals, books, travel) to be covered and $15k may be enough. You can definitely ask for review of that amount if you still have no jobs by this spring. They may be able to make the loans subsidized, give some SEOG, even approve a Pell grant if there is really no income. Is it really going to allow her to choose another school? If so, ask for the professional judgment now. If not, ask for PJ later in the year when things are looking up or looking really bad.