For years the CO and his wife lived in rotating jw homes....for years. In some cases they stayed in the same home for several weeks in larger locales. The owner and his wife many times gave up the master bedroom and adjoining bathrrom for the CO and his wife. The travel trailer and a temporary space to park it was the next step and some KHs set up water and electricity and sewer hookups. Then some circuits had apartments at the AH or a central KH. But the tax structure in the US got more strict in the same category of "selling" publications, food at conventions, etc.
No retirement or social security, many of them both had to get jobs and if lucky were given a place to live by someone with money they cultivated over the years...friends. Many times their jobs were jw related as well.
I knew of some COs that were independently wealthy having inherited quite a bit from their non-jw family.