They have little revenue cannot be money to buy a house or rent a home with high prices and with the lack of opportunities, such as utilities, clean water or electricity needed to sustain life.
They can not earn less money to buy a house or rent a house with high prices and a shortage of opportunities for infrastructure such as toilets or electricity needed to sustain life.
They earn less money to buy a house or the house at a high price and chance of environmental infrastructure such as shortage of clean bathrooms or electricity needed for the living.