If your EFC is $70K you are likely attending one of a handful of extra-expensive schools. Cost-control choices include:
= transferring to one of your in-state unis (the most expensive ones will still be half that; many a quarter of that price)- depending on your state & GPA that may be harder- or easier
= sit down with your advisor and figure out which of the classes you have left to take must be done at your current university. There are usually rules about which and how many classes you can take elsewhere. but if it is important to you to keep the expensive school, see if you can get some of the credits at your local CC- much cheaper
= @ $70K residential housing is included. You can look for less expensive housing solutions, or see about subsidized housing. For example, RAs (Residential Advisors) typically get housing as part of their package.