There are a lot of trains I'd take in America if they were also had car carriages. There's only one East Coaster that does it. Pity, and I get why (no one else seems to want it) but if it were to happen, I'd be pretty happy. Imagine parking your car on the train, hanging out with your friends in a private room, sleeping on the train and then waking up in Denver and just hopping into your car to go up to Aspen. Nice.
How little would it have to cost or how long would your vacation have to be to compete with a simple rental? Sometimes you can rent for $15/30 a day and I don’t think transporting a whole car would be particularly cheap, given the price of a train ticket in the US.
Yeah, it's possible that it's not economical. I think I'd do it for a $200 SF to DEN premium. I would expect the train tickets for passengers to be cheaper than the flight, though. A flight is currently $150 round trip. And I'd expect a four person room on a train to be approx $400 round trip.
