RPCX 391 was retired in 1967 as passenger train service diminished, it had many owners since, one person who purchased the historic car placed it on a cement slab and used it as office space in Centerville, Minnesota. Now, it's going to be a tiny home

RPCX 391 was eventually bought by a private owner named David Rushenberg, who wanted to refurbish the car to run excursions and charters for Amtrak. The owner’s son, Lee Rushenberg, acquired the car when his father passed.

“My dad refurbished historic rail cars as a hobby, and some even ran for Amtrak. He acquired this car in ’87 or ’88, but it sat on the backburner for years,” said the younger Rushenberg, also a rail enthusiast and a locomotive engineer for Canadian National Railway.

Since RPCX 391 had been used as a stationary building by the previous owners, Rushenberg’s father purchased a retired and burned baggage car for its truck assemblies as the new set of wheels for 391. He was the last person to add major renovations to the car.

RPCX 391 was recently purchased by a new owner, Andy Bergman, who is having the car moved to his home in Ennis, Montana

Bergman will soon be renovating RPCX 391 into a tiny home that will be an escape from everyday life. The original first-class lounge section will be transformed into a family room. The kitchen, located adjacent to the first-class section, is intact and will remain a functioning kitchen complete with authentic appliances.

Originally there were five single bedrooms, but Bergman plans to merge them so there will be two larger rooms and one small room for a bathroom with a clawfoot bathtub

Converting historic passenger rail cars is no easy endeavor, but Bergman has been a longtime railfan. With the expert guidance and help of a good friend, they laid 80 feet of 125-pound rail and railroad ties and ballast. A telegraph pole from the former NP line into Butte, Montana, where the 391 rolled by for 20 years of its life, completes the setting.

“As a kid, my father and I, along with our friends, would go all over the country to take pictures of trains,” Bergman explained. “Fast forward 30 years, when my wife and I visited Chico Springs, Montana, and our hotel room was a caboose. We then got the idea to build a tiny home out of a historic rail car.”

https://www.railwayage.com/freight/class-i/history-brought-back-to-life-a-northern-pacific-passenger-car-to-become-a-home/