If you follow Robocchio's timeline it's not in Las Vegas. He talks of being in northern Arizona and will pass through Vegas sometime soon. It's either in Laughlin or Arizona. You know, one of them dirty, filthy, cheating Indian casinos that Robocchio has sworn many times over that he won't play in. Might be Twin Arrows outside Flagstaff.
PS: a "home machine" is a machine that used to be in a casino so yes, you can change payscales.