When you look at $ per flying hour (the standard measurement of aircraft ownership), the 747 is peanuts compared to something like Concorde. Almost every airpo

When you look at $ per flying hour (the standard measurement of aircraft ownership), the 747 is peanuts compared to something like Concorde. Almost every airport in the world has infrastructure to handle a 747. Very few can handle something like Concorde. (Talking mainly runway length requirements and noise abatement regulations). Not to mention service facilities (and the Concorde needs LOTS of servicing between flight sequences). Also, 747 qualified pilots, mechanics and support personnel are easily found whereas Concorde experts are like hens teeth, and likely very expensive to boot. Plenty of lease companies and boneyards have spares and components to keep a 747 flying too, but very few have replacement Concorde engines or avionics on hand. Added to the mix, these 'uber rich' who can afford a 747 also like things like King sized beds, shower facilities, meeting rooms, even spas in their aircraft for maximum comfort. There is simply no room in the Concorde's narrow airframe or limited payload capacity to even think of trying to fit these things in.