The woman who works at the bank with one leg also shows up in some episodes of My Name is Earl which has the same creator/executive producer of Raising Hope.
The second man (holding the Emmy) to get "kicked in the jingles" on the car salesman's computer is series creator, Greg Garcia.
Virginia and Burt buy their dream car, The Delorean from Back To The Future. Christopher Lloyd stars as the bank manager, who turns out to love said car. Lloyd was Doc in Back To The Future.
Sabrina calls Burt and Virginia "Morticia and Gomez" from the Addams Family. Guest star Christopher Lloyd played Uncle Fester Addams in the first two early 90's Addams Family movies.
When Burt and Virginia are trying to get the Delorean up to 88 mph and smoke starts billowing from the front of it only that the Delorean has a rear mounted engine.