Some cheap but o.k. motels. Travelodges (1 at each end of the airport) and an Econolodge though you'd probably have to pull for the full night ($40+). If you have eyeshades and ear plugs, I could recommend a safe, quiet corner of the airport (baggage claim area, north end) where you can sleep on the benches (had to do this due to late arrivals and for early morning and missed connections a few times) and where the incessant public safety announcements do not reach for whatever reason.
[This message has been edited by terenz (edited 09-08-2000).]