Deciding which south American country to move to

As the question goes, I'm looking for a place to settle for a year+. I've looked into other European countries but still not settled on a place.

I need:

Decent hospitals, especially maternity - public or private

Cheap rent and cost of living

Internet

Safe from big crimes

I like to learn the language and integrate into community so locals that welcome foreigners would be great

I'm not after anything too fancy, just a cheap place..near the coast would be lovely but I'm guessing it'll be too expensive there

I've looked at Santiago but it's probably too built up and polluted, looking at a smaller kind of city Argentina seems too expensive, Columbia I'm really not sure about. Any ideas are welcome. I find conflicting info on how it is there.