Most tax dodges are really not worth the bother. If you buy a corporate bond and pay the taxes, you will earn more than if you buy tax-free municipal bonds. I suppose that there are a lot of accountants that tell their clients "we saved you $x00,000 by putting your money in munis" when they would have earned perhaps 2% more by just paying the damn taxes. A lot of financial advisers never bother with any investment that does not get them a fee, even when the investor is paying them for their services.
I met a "Professional" adviser who was entirely unaware of Vanguard, TIAA-CREF, Scottrade, T Rowe Price a number of other no load companies, and mentioned only the ones with the hefty fees: Merrill Lynch, Eaton-Vance, American and others I had never heard of.
The goal of a good adviser should be to determine the appropriate risk and then to find those investments that have the best yield within that risk category. If all they are thinking about is them getting paid twice (once by the investor, once more by the company), then they are not doing their job.
I was unaware of any deals with the Cayman Islands. Often the deal there is to deliver cash in a briefcase. They have a huge number of flights every day out of Miami, considering the minuscule size of the islands, the fact that staying there is more expensive than many other Caribbean islands, and a population of under 60,000. They do have a good educational system, it seems. All the Cayman Is. students I have had from there were excellent. Of course, it could be that the bad students do not get scholarships to leave the country, but I am told that there are few drop outs and the educational level is quite high.