I would do what me and my friends always wanted to do... and it was a school bus we wanted for it.
Load that bitch up with a high wattage power inverter, a few more car batteries so that it lasted longer when turned off and place a nice lil' network system in it that included wireless. Then we could take road trips in the bus and anyone could join along in their car with a laptop and wireless and have deathmatches on the road!
This would also go with the couches and love seats and blah blah blah as the road trip would be more then gaming, but also would be sight seeing and that fun stuff.