Before anyone says "just use a PO box for that", those need a street address too (and also proof of residing in the city or county the PO box is located in). Plenty of services also refuse PO boxes too, including vehicle titles/registrations and a driver's license.
Yes, you could try convincing a very good friend or family member to lend you their street address if you really can't or won't pay for a place of residence yourself, but that's literally leeching off their generosity and good will which doesn't sound like a nice way of living if you ask me.