Here is an excellent example of a homemade Barney and Betty Rubble costume. This would work really well for a couple trying to find quick thrifty costume idea.
Link: http://www.costumeideasforcouples.org/barney-betty-rubble-costume-idea/
Spaghetti and Meatballs Halloween Costume
Quick and Easy Halloween Costumes
Raining Batmen
Mary Poppins Costume
Making a Witch Broom
Paper Monster Rings