With the U.S. being billions in debt and still trying to build trains to nowhere that won't be used after the first trip, Nancy Mooney hit it right on the head. The selling point of the whole idea is the speed to get to Las Vegas.
Think about it. First stop at the parking lot to pay for parking, then wait for a shuttle bus to get to the train, then the ticket line, then when you get to Las Vegas, wait for a shuttle to get you to town. How much time did you save? Then you have no transportation in Las Vegas. Is this smart? Then if it breaks down half way there how long do you wait for a ride?