The Rigsbys' hometown is given as Bannertown. Bannertown is a real town in North Carolina, just a mile or two from Mount Airy, Andy Griffith's hometown.
Adjusted for inflation, $50 in 1964 would equal $496.43 in 2023.
As he's reading the newspaper, Barney tells Andy that he dated Phoebe Gilbert, Limley Gilbert's sister. In Gomer Un-Trains a Dog (1965), Gomer Pyle tells Sgt Carter that he used to have a dog named Limley Gilbert.