[AlexanderHowl]

I can tell you from personal experience that quality matters. Enlisted quarters in the USN are bunk rooms while officer rooms are cabins (double occupancy for junior and single for senior). A fleet admiral probably gets the equivalent of a single occupancy luxury cabin (no jacuzzis, but there is plenty of space).

People start to go crazy after six months at sea, which is one the reasons why USN prescription rates for antianxiety and antidepressant drug have skyrocketed, as the USN is extending deployment times to eight months. And you can usually go outside for a break, so the pressures are less than they would be on a comparable spacecraft. Other than the best of the best, like the astronauts that NASA trains, I doubt that many people will be able to tolerate living in a spacecraft bunk room for more than three or four months. Beyond that, it is blood on the bulkheads and brains on the ceiling time, as everyone will try to kill everyone else on board.