Hot Tubs on rails - Trains Magazine

I read up on the Marlboro train a few years back. The Hot Tub car was partially built. I saw a pic somewhere of a carbody with internal framing on shop trucks. It was at the then Colorado Railcar Facility. I think I read about it being sold as is.

As for putting a hot tub in a passenger car: how would an 85-foot car handle the 4,000-lb weight of a 500-gallon tub? Perhaps build 3-6 four person tubs in dividable rooms? A concrete floor in the car could keep the car's center of gravity reasonably low. The sides of the tubs could be designed to handle the water sloshing. Would 480V HEP be sufficient to heat the water and run the pumps to keep the water circulated? Being new construction, would the cars be required to be ADA accessible?

All it takes it money. 

As for the Marlboro Unlimited, point a browser here:

That website has a vast, vast collection of internal Philip Morris documents. P-M referred to the train as "Project Thunder". That's a useful keyword as is the builder: "Rader Railcar". The project was well planned and thought out at the time it was scrapped. A persistent searcher can find interesting info on the train, and how P-M planned to use it.

 /JB