I imagine the real problem with something like this, will be the cost of keeping it in the air safely - whilst making a profit.
Ages ago I did some work down at British Airways and went into the hangars there, ended up speaking with some of the techs who used to look after Concorde back in the day. Apparently it was a nightmare to keep in the sky due to the insane amounts of specialist maintenance it needed. It needed to be x-rayed, stripped - everything, way more than any other aircraft, which cost a fortune.
With stuff like the Airbus and Boeings, they have standard service schedules etc, etc - but the Concorde, everything was bespoke and 10x more expensive..