I’ve seriously looked at Costa Rica. Advantages: They allow legal residency with a fairly low asset level. (500k IIRC).
They are a democracy with freedoms we take for granted (speech, property rights, etc.)
They are non-militaristic – no army.
disadvantages – I’d need to learn spanish (not a deal breaker). The places I’d want to live (Pacific side) are more expensive and further from the main airport.
Other countries (new zealand, australia to name two) you have to either have sought after skills of serious $$. Australia was particularly difficult if you were above a certain age – even if you career/skillset was on their list.