I wouldnt worry too much about the mouse - use the laptop touch pad when u need to.

2 x wireless keyboard receivers running off 1 keyboard would be a good start.

If you are running 1 dps/tank & 1 healer on follow you could even use my ghetto solution alternative to Xkeys - a £5.99 usb numpad propped up above my desktop keyboards' F keys to take care of healing