One payment saved up should be sufficient.
A school is in phases, at first its pretty strict, (not as strict as BC), then they will phase up, and earn privledges with time. She will be able to have visitors in Pensacola, but I would wait until she moves up in phases, she will have more liberty to spend time with you. It is a fun base to visit, there is an aviation museum on the base and an old fort, with tours, and Pensacola beach is really nice.
She probably wont be allowed her car until she is in Phase III, she will be able to ask when she gets there.
SouthCorolina - Is the car leased? Per the Servicemembers Civil Relief Act (SCRA), military members may terminate automobile leases. If a member enters into an automobile lease before going on active duty, the member may request termination of the lease when he/she goes onto active duty.
This is just an overview, but you can search on SCRA after reading this...(read about auto's and cell phones)