There are 5 Caribbean islands that you can get a passport for your family for about 200k. You can avoid all future taxes if you renounce your citizenship and avoid your capital gains upon leaving the US if you live in PR for awhile 1st. After you get your passport you can live almost anywhere in the world without a visa (less than 6 months per place year in each place).
I live in PR now under Act 20 and 22 and pay 4% and no capital gains.
I saw a youtube video on this. Interesting. Is it liveable? Just from watching the news in a disinterested manner - it seems to be on the verge of bankruptcy. Is it stable? Do you feel safe?