Homeless people have physical needs that need to be addressed. Water needs to be obtained for drinking, bathing, cooking and laundry. If a meal is going to be cooked then firewood or fuel needs to be gathered. Food needs to be acquired. Sometimes the entire day is spent walking to various locations for social services.
Some men obsess about constantly improving there living structure.
As urban campers find new building materials the shacks get different windows, different furniture, carpeting and roofs improvements. Their homes never look the same. Sometimes the carpenters build a second structure and sell or rent it to another homeless person.