I can't say a lot about Rincon because I don't know but Mayaguez is the most American like city here with the highest rate of english speaking people I have seen.
Living costs on most everything is a little expensive here except for service related items (car repairs, appliance repairs, etc). Expect a 5 - 10% increase in living expenses.
You will need a car to get around unless you live in Palmas del Mar and then you will need a golf cart, there is a car rental on site if you need to go further than the onsite.
Things to like. 1. The weather 2. Simpler Life 3. Tropical Fruits/Nuts everywhere 4. Less regulations on things I care about (homeschooling) 5. Tax system that is not the IRS 6. More community minded people, probably more like the states in the 70/80s. 7. I have a personal swimming pool, tennis court, basketball court and decent sized house for less than the one I left in Atlanta.