A traditional MMO server park( like WoW ) needs a 24/7 support and maintenance crew.
WoW is not a traditional MMO, but besides that here's the catch: By the time you need a server solution to handle more than 2000 consecutive players (the limit on WoW servers as far as I'm aware), you can afford to hire support staff. Besides who says a server must run 24/7 and have support? The Star Wars Galaxies servers (run by Sony Online Entertainment) are only up 23 hours a day (on a good day), and as far as I'm aware support in Anarchy Online and Puzzle Pirates is (or at least has been) mostly done by players who volunteer(ed) for it.Like I said, saying something that has already been accomplished on several occasions, is "unfeasible" or "impossible" is at best ignorant.