These are all the countries I have given consideration to retiring to. I am 58, my wife is 57, so I have a few years to go.
>>What other countries have you considered other than Mexico?<<
My wife is from Mexico so it is easy. She is a citizen so can outright purchase property at the shoreline (not allowed directly now for non-citizens).
We have been to Mexico hundreds of times both for family and for fun since we got married so the only decision is where to settle and when (we are 60-something). We are looking at the coastal area between Cancun and Playa del Carmen. A spot almost halfway is named Porto Morelos looks really attractive, especially for real estate prices.