As an example, I have seen videos of "house sitters" in Portugal that effectively "work" by staying at other people's houses while the other people travel, usua

As an example, I have seen videos of "house sitters" in Portugal that effectively "work" by staying at other people's houses while the other people travel, usually for longer periods, eg. weeks or even months. They water the plants, feed and walk the dog, make sure the property is lived in. They are not officially living there, but practically, they are. I was surprised that it is possible to make a living of this, but apparently it is!