Instead of having one large Teslive event, how bout having one per region (Teslive West Coast Q1, Teslive East Coast Q2, etc.) - this would increase awareness throughout the country and would not require too much traveling.
The problem is that you would need a large number of people to organize and high quality speakers would be hard to come by. I doubt folks like Jerome or Lelani would attend more than one or two at most. I suspect you'd get about the same attendance as a Cars and Coffee, with the same people that you saw at the local Cars and Coffee.