The fuel burn won't be that bad. Figure it packs 269 usable gallons internally.
figure $2.65/gallon 100LL Avgas to fill it up (I would fly it to Madison County, UYF, in Ohio to fill it up at a bargain price of 2 bucks a gallon)
$712.85 to fill it up.
(Source is Mustangsmustangs.com)
Since we won't be getting into combat with our P-51, 325 mph will be our cruise speed and we will always cruise at 10,000 feet for this expirement.
Combat Range of 1125 miles at 325 mph gives a 3.46 hour endurance. burning 269 gallons in 3.46 hours yields an 89.6 GPH fuel flow. This is off because it is combat range and I do not know how it is determined, it is figured for higher power settings for a duration of time...No idea on real figures.
Anyways...figure 89.6gph $237.44/hr for fuel...this is quite high but it gives you a good ballpark figure but don't forget oil. In addition to annual inspections, unscheduled maint and misc consumables (tires, brakes ect ect) you're looking at a pretty nice chunk of change.
Aside from ownership costs and hangering...plan on budgeting $300/hr just to fly your P-51.
Anybody wanna go halfises

Maybe if we pooled our money and as a community purchased a P-51...