L.M.
Here's an idea: My family doctor came into the room a few Halloweens ago with empty mini cereal boxes hot glued to his lab coat. They had plastic knives stuck in them with what looked like "blood" around the boxes and knives (probably red nail polish). I asked what his costume was, to which he replied, "A Cereal Killer"... LOL get it??!! heheh anyway, you could do that. It basically costs just the price of the cereal and knives and you/hubby can use an old shirt to glue the boxes on. It's good for a good laugh, and you don't have to deal with makeup, masks or bulky costume things....
Have fun!