I've been retired a couple years now. Recently decided to sell my house and move to Argentina. My plan, currently, is to stay in Buenos Aires for maybe 6 months, get settled in, bring my Spanish back up to fluency (and master the local dialect/accent) and obtain a rentista/pensionado visa.
I owned a travel agency in the US and have been all over Europe, Asia and the Middle East, as well as South America. My time in Argentina has been limited to Buenos Aires, and it's my favorite city in SA. So I'll be fine there for a while. But at heart, I prefer smaller, quieter places to live. Using BsAs as a base, I'll go explore other areas, and likely move to one in a year or so. Mar de Plata has caught my eye (I love the ocean and fishing), but I hear others raving about Mendoza or Cordoba, etc. So...we'll see.