^^^ this. But this requires capital to even begin. I've considered buying an apartment in a country way cheaper than where I live, and AirBnB'ing it, and paying someone to manage cleaning and key exchange.

In some countries you can get a central apartment for $35k, and a normal wage is $600 per month. If you manage to rent it out on AirBnB for $6-700 per weekend or so (what I paid for an AirBnB in one such country last week with 5 people in a large central apartment), you could make nice profits.

Even renting it out to someone over long term would be profitable; lower profit (potentially) but less risk (definitely)