According to [1] it costs an average of $500,000 per engine
[1] https://aircraftbluebook.com/Tools/ABB/ShowEngines.do?sortKe...
I suppose you can travel to your hearts content in africa and Asia, but you wont be able to land in Europe or NA.
In the US, the FAA as minimal-to-no restrictions on the sorts of things you're allowed to use to lift yourself into the air, provided you take steps to make sure no one other than you is harmed by your decisions.
Well there's the rub, isn't it?
What goes up must come down and the chance of the latter happening uncontrolled is a lot higher with engines outside their maintenance window.
Better hope it's not your house it crashes down on :)
The chance is pretty low yes but that's exactly because of all these regulations and maintenance overhauls.
Yes, experimental plane regulations deal with exactly this. There is airspace that is closed to them, you cannot simply fly them over your local downtown area.
Lots of Americans live in very rural, remote areas and several own their own airstrips far from any populated areas. If you're crop-dusting your own fields on a 5000-acre ranch then no one cares when your plane was last serviced aside from the pilot.
The second function is FAA regs.
Third is that most, but not all, pilots will not fly on aircraft that are out of maintenance schedule.
The universe of owners/operators that disregard the above is frequently the cartels or other criminal orgs.
The aircraft can also be used as a source of scrap parts, (IE, another person owns the same aircraft and wants to replace components that are no longer in production, so they buy this one), or it can be scrapped itself and used as say, a burning man art car, or a feature at a cool airbnb somewhere.
Ok, you just won the Internet for the day. Thanks for that laugh.
Uh, the fatal nature of airplane crashes? The next forcing function on the list is called the FAA.
Except the very light aviation such as trikes, ultralight planes, ultralight helicopters etc.
By applying the same risk tolerance of other vehicles light aviation enthusiasts can fly many hours/miles at surprisingly low costs, and if shit happens they have a parachute for the whole plane to deploy, it's been developed in the early 2000s and it's more and more frequently built in the ultralight or installed de novo.