Charlie, i.e. Jesse White, tells Oliver, i.e. Eddie Albert, and Lisa, i.e. Eva Gabor, he has about 5,000 acres of farmland. That amount of farmland is approximately 7.8 square miles land.
Believing Oliver and Lisa to be broke, Charlie gives them jewelry, a fur coat, a blue tractor, automatic milker, a combine, and 30 head of cattle.
When staying at the hotel there is a scene in which they are in bed. The two art pieces above the bed are by the popular modernist artist Charley Harper (1922-2007).
Lisa's backstory changes from details in earlier episodes when she reveals that on Park Avenue Charlie's father was her mother's bootlegger, implying that during Prohibition she lived in New York. This differs from the WWII Hungarian connection revealed in Wings Over Hooterville (1966).
Mr. Haney's mention of '30s song-and-dance star Ruby Keeler as a possible intended for a kiss from singing cowboy star Gene Autry is ironic, especially since these two performers never appeared together.