I'm with those that said gypsies or Irish travelers.
Part of their scam is to go door-to-door where they can keep the homeowner occupied while the accomplice sneaks into the house through another entrance to burgle it. Florida gets these folks alot.
Another thought I had, since I sometimes have a misplaced trust in folks like this, is that he may have been working contract work - sort of like a temp agency or day labor organization. Still, he should have had ID which means he was probably illegal.
I say it's either gypsies, tramps or thieve. The guy was probably doing whatever he could. Preaching a little gospel
Selling a couple bottles of doctor good.