LT4, I don't have any idea on the actual costs, when broken down per hour, per mile or so on. I tend to be in denial when it comes to aviation related expenses!
Thinking aloud here, My aircraft burns 13.5 gallons the first hour and 9-10GPH thereafter. Yesterday, I paid $7.50 per gallon at SGJ (St. Augustine, Florida) . Plus they were unwilling to waive the overnight parking fee, they did waive the "facilities fee".
At that rate, I'd rather walk. Because, that's foolish money. I can't afford that and neither can most middle class Americans.
I work as an A+P, so I do all of my own work, except the annual. I get a small discount (5%) on parts too.
So, my expenses would be less than the average guy. But, fuel is the #1 expense. While it is still possible to find airports that have "more reasonable" fuel costs, I don't fly to those regularly. Nor are they practical to land at, as most add an hour++ to a trip, just to purchase cheaper 100LL.
Just an FYI, 2000 hours engine life, 10 gallons/hr at $7.50 = $150,000 JUST FOR FUEL!