Not exactly the same scenario, but I was a Bethelite "missionary, circa 1970. In the foreign field, we bros spent all weekend and a few week nights building up "nuclei" into congregations. Often, we traveled to upstate New York doing the same. Giving hour talks on Sunday and conducting meetings. Before getting regular, rented Halls, we would set up for meetings in community centers, transporting sound equipment in a baby buggy from a brother's apartment to the center. Great fun on a week night, traveling by subway to and from!
It was exciting and fulfilling because the Caribbean folk were so warm and hospitable. Most importantly, they were amenable to our message. It was not unusual both to preach to and to teach a room full of people in a private home. We also assisted them in personal matters. Many were family men who worked secularly in Brooklyn, NYC, etc. to provide for their impoverished families back in the islands.
Downside: Some of us young guys burnt out physically and spiritually. I don't regret the experience, but young, dedicated JWs can become depleted spiritually and physically. It took me years to recover . . .
CC