I spend way to much every year. This is especially true if you include an off-site storage space, candy some of the other things several of you have identified. However, the biggest expense is when changing themes. For years I've built and used props associated with a cemetery. Next year I'm thinking of starting a new theme using clowns. While I can switch between a cemetery or a fun house clown theme every other year, the cost to do this can be quite expensive. Not to mention the storage space required.