Our town does a thing every Halloween where the downtown businesses offer trick-or-treating for the kids. This came about a few years ago when there was a lot of controversy over house-to-house trick-or-treating because of the “risk” associated with accepting candy/food from strangers. One of the insurance offices had someone in a full-on Iron Man costume around for pictures.
Seahawk went as Russell Wilson (of course!) and Munchkin was a ninja. I think we spent a sum total of $8 for their costumes – $4 at Goodwill for the football helmet (which is actually a softball helmet, but no matter) and $4 for the fabric to make the ninja mask. They just wore regular clothes otherwise.