i think you have to carry out as much research as you can and feel confident in the country you are looking at i always find that looking at the economic situation of the country without the real estate and construction aspect of the country is a great indication to how the investment will do long term if the country has a high dependance on construction for its gdp growth then you could find yourself in a sticky situation once the market cools
it is always better to look at cities rather than lifestyle investments as these are more relistic in the long term to gain in both rental and capital value