Craig and Elaine are moving

 The Arizona Burdett's have been on a waiting list to get into the Family Housing at the Arizona State Poly Tech Campus.  When they first moved to Phoenix they planned to attend the main campus and located housing there, but then Craig is attending the Poly Tech Campus and Elaine is working at the airport located next to the campus.  Now they are both within walking distance of school and work.  Rent is about the same- approximately, but they go from 2 bedrooms to a 3 bedroom with a study.

 But look how much they will save in GAS!