So he's doing Xbox 360, PS3 and Wii?
How is he going to accomplish that without some serious hardware development?
Most PS3 FPS games don't support mouse and keyboard so his PC mouse based gamegun would need to convert to DualShock signals. The same issue for the 360 exists and ALSO, that Microsoft uses some sorta authentication chip on their controllers so only authorized companies can produced third party controllers. The Wii... Well that's a clusterfuck of it's own.
How is he expecting to put all that into one home brewed box, without having to kitbash a mouse, a DS3, a 360 controller and a Wiimote into one $500 monstrocity?