I’ve toyed with the idea of buying abroad for retirement purposes but decided against it. Unless you’re very familiar with an area you’re planning on moving to, you’re taking a big chance.
I think renting abroad, particularly in the early stages, is a better option. You have none of the responsibilities of home ownership and you have the flexibility to try a number of different options should you get fed up with any single area.
Also, you want to be able to relax while abroad without having to worry about decorating, upkeep, home insurance, utility bills etc. A cousin of mine bought a beautiful apartment in Italy some years ago but seems to spend his holidays tending to some sort of domestic issue - broken washing machine, residents association issues etc. It’s not all chianti and tiramisu. He also pays about 1000 a year in management fees.
Think also about the lifetime cost. Off season rental in many resorts is very reasonable. You could spend two months abroad for a couple of grand. Over say 20 years, this is a lot less expensive than forking out a six figure sum on some property that you’ll be tied to in the long term.