Japan has some of these problems. For example: they do not care about homeless people. In Japan, I saw a homeless person sleeping between two car lanes, amongst some bushes. Literally 50cm of space separating cars, and he was lying there with his possessions.
They are cheap because they are in disrepair, in an area with no jobs (or only subsistence farming) and limited services. In central Tokyo, they are cheap compared to cities in most of the West but too expensive to keep up a good drinking habit without working and on limited out-of-work benefits.
Japan has some of these problems. For example: they do not care about homeless people. In Japan, I saw a homeless person sleeping between two car lanes, amongst some bushes. Literally 50cm of space separating cars, and he was lying there with his possessions.