Some folks in Mayberry seem like they don't do ANYTHING for a living. They must have some source of income, though. And there are some very interesting occupations in The Friendly Town. Let's name the person and what they do for a living. If we don't know for sure we could mention clues as to what the occupation might be:
I'll start with an easy one:
Thelma Lou "works at the office."
Emmet's brother-in-law, Ben Beecham, was in the insurance bid'ness. He was also a former postal employee named Talbot in one episode, and Billy Joe in another. He said he had more authority because he was a "fed." "the mail must go through."
and let's not forget Henry Wheeler, the handy man, handy with the ladies that is...old Goldbrick!
Mrs. Lukens owned the shop where Andy bought Aunt Bee's bed jacket. This must have been after she changed her name from Rodenbach, but before she got married to Emmett.
Sam Jones was a farmer/city councilman.
Mister Hendricks sold butter and eggs but he had to stop doing it in Mayberry after Andy made him realize there was a bad rumor going around about him and Aunt Bee.
Wilber Finch was a shoe salesman. He was just about washed-up but made it after all because of rumors that ended up to be beneficial.
Otis defected from Mayberry and went to the Mt. Pilot jail where his cell-mate: Luke, had a mother who was a nurse.
Mr. Frisbee sold chickens... oh and moonshine liquor for guzzlin cause its hard to make a killin sellin' chickens.