http://kotaku.com/5062303/invade-stormwind-you-and-what-arm++-oh-that-one
When you can't convince 35 other people of your master plan to attack two Alliance capital cities, you really only have one alternative: Do it yourself. "Bradster" does. He owns that rig above — 11 computers that run 36 World of WarCraft account simultaneously. His infrastructure costs (to say nothing of his utility bill) weren't itemized, but he unashamedly admits he pays $5,711 per year in subscription fees to keep together his one-man raiding party (family photo of that on the jump).
That is just... WoW.
Edit: Original forum post: http://www.dual-boxing.com/forums/index.php?page=Thread&threadID=14611&pageNo=1