You could start a shop. Build it as a rental property. Create a club of homeless renters that meets at your shop. As club activities, they do household chores, cook, clean, repair, garden, etc. Give them a locked door that only they can enter. Place something expensive for sale behind that door, the equivalent of one week's rent, or more weeks maybe. You open the shop and let them buy the sale items. If they buy one week's rent, you visit them next week, if they buy three weeks' rent, you visit them again after three weeks.