Over the last 4 years we have averaged $12k per year on all expenses for our RV10. This includes Fuel, Hangar, Insurance, and Maintenance*. This is for an average of 82 hours of flying per year. This comes out to about $147 per hour without factoring in any money set aside for engine overhaul one day in the far future. It's startling how much we spend on hangar rent, but the options are limited around here if we want to be within 15 minutes of the plane. One of these days we'll end up at an airpark and roll that hangar cost into a house.
*Maintenance costs really should be labeled maintenance/upgrades/subscriptions/misc. Its basically everything else like new headsets, batteries, oil, foreflight subscription, EAA membership, etc.