Well bandwidth for a single player is going to vary because of the factors of : Location and speed/connection. I run a minilogin server in my house and use the Media computer (2gb ram, 2.8ghz AMD dual core, and a 300gb hd, and 2 Nvidia SLI cards)..(its early cant remember everything).. I run through lan but that wont help u determine how the ping is like but, with 5 computers connected to the same computer (server) I get about 14-28ms ping, and the load is fine, I dont lag at all on any computer, and the zones load considerably fast... But I only allow 5 zones to boot, since I have only 5 computers connect.
Hope it helps
, its not hard to set up hehe, and since u know alot more than I do, then you should be fine setting it up.