You seem to govern yourself regarding the whole WoW set up. But for one player, him, not so much. To date, he has 36 separate accounts that cost him almost $6000 (U.S.) a year. And that's not figuring in the time factor "expense".
In his words, "Not bad considering I’m looking at it like it’s a hobby and there are more expensive hobbies out there than World of Warcraft."
His reasoning for doing so- "The main reason is to invade Stormwind and Ironforge when they reach top level. I’m sure the Alliance will put up a big fight when that happens. We’ll see how it goes. If they don’t make level 70 before Wrath of the Lich King, then it will be at level 80. That is my main goal. That will probably happen after I’ve got some PvP gear from the battlegrounds. I’m also planning to do some 25 and 10 man raid instances but that is secondary to my PvP goal. Of course I’ll be doing arenas too to build up PvP gear but I’m not expecting to do that great there because I’m way behind in gear right now. I need to get to level 70 first, then level 80 and by then I will probably have all green gear while most others have been doing the battlegrounds and arenas."
Here's a pic of his set-up.