This was traveling in style! This ad for Holiday Tandem Trailers was in a 1948 Holiday magazine. They were meant for traveling, but the postwar housing shortage was so acute that many people ended up living in them.
This was famously depicted in the Lucille Ball/ Desi Arnez film, The Long. Long Trailer. The year was 1953, and I Love Lucy was already airing on television. The studio, MGM, was a bit luke-warm about the project because they feared that people would not pay to see what they could stay home and watch on TV. Arnez was so sure of the movie’s appeal that he bet $25,000 that that the movie would be the highest grossing comedy up to that date. He won his bet!