This discussion is headed off into the weeds due to misinformation. Most U.S. domestic automobile insurance policies don't provide any coverage for operating any motor vehicle overseas. (A few offer conditional coverage of US drivers in Canada and Mexico, but that's not germane to this discussion.) Bonaire is certainly "overseas" and I've never heard or read of anyone being covered by their US policy while living or visiting there. I asked my longtime insurance agent about it a couple of years ago. His firm is a multi-carrier broker with access to automobile policies from The Hartford, Safeco, Progressive, and United Heritage. None of his carriers offered overseas coverage and his advice was to purchase the CDW and/or credit card insurance when travelling outside the US. He felt that $12/day for CDW and $25/rental for Amex CC policies offered good value and complementary coverage.
Regarding the original post and question, there's no need to answer it further. He already stated back in post #4 that he misread the property's website and that CDW is included in the insurance rate. (It's possible that $350 was the weekly rate for rental + CDW.)