The 'orange grove' in the film's final scene was actually the house and land that W.C. Fields was renting at the time. Fields never bought a house or a plot of land his entire life; he always lived in rented places. This unusual preference reflects his distant stance toward a settled life.
The car the Fields family drives away in at the end of the film is a 1931 Pierce-Arrow Model 41. What makes this vehicle special are its headlights, which rise from the front fenders; this design was used exclusively by Pierce-Arrow under patent until 1940.
The family sets out on their journey to California in a 1929 Ford Model A. This vehicle is known as one of the durable and common family cars of the era.
While Harold tries to sleep on the swing on the back porch, there are exactly six electric meters and wiring done with a 'knob-and-tube' system right beneath it. Today this wiring has been almost entirely abandoned, and its use is permitted only in very specific agricultural areas.