S.W.
My daughter (11) has become known in her neighborhood for her amazing, home-made, costumes. So I can't keep up with her in costuming! I will sometimes wear something simple - dress in black & wear a mask.
She has come up with and made mummy, robot, and a scary clown on stilts (yes, real stilts) costumes the last three years. These were mainly made with materials we had on hand, so expenses are minimal (glue & paint, cheap clown wig). She gets this creativity from her father, who has costume pieces and face make-up at hand!