I'm not going to dox myself by revealing the firm; I believe I was the only American on site at the time and I was certainly the only one performing millwork installation.
I determined they were happy and eager because I spent each evening with them eating and watching soccer. I was down there during Christmas, and Liat airlines happened to go on strike so I was stranded there for 3 additional days. They made me feel very welcomed. I would spend the evening with them and then walk the ~2 miles back to the small house that was rented for me.
I don't know how much all of them were paid, but the framers were making a weekly salary of $750 IIRC (or so they claimed) and that was beyond a decent wage 15 years ago. Especially considering all of their expenses were paid. I flew down there on my own with all of my personal tools, did most of the work to secure a temp work visa on my own, and I only pulled in about $1250 per week back then for work that required quite a bit more skill than rough framing.