"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
From the Cross and Cockade Journal, Vol. 11, #2 Summer 1970 issue, page 157, almost the same photo with a caption that reads: "The famous Mercedes engined, air powered railway flat car of Fliegerabteilung 304b, with a load of airmen aboard. Lawrence Smith rode on this same flat car on several of his trips into Haifa while he was prisoner of Fl.Abt.304b" Remarkably, the picture on the magazine depicts the same scene and same people just moments before, much like two frames of a movie reel, and thus proving that the flat car indeed moved from one shot to another. About the Caproni "Flying Hotel" it was an impressive feat of engineering... doomed to failure. It's easy to realize nowadays, but this flying boat was built right after WW1 when the concept of the luxury ocean liners was what defined high class travels. It makes you remind of all those St. Chammond tanks, but winged.