At the extreme end, with absolutely zero zoning restrictions, you could build capsule hotels for people to live in, driving the price for a tiny tiny room to, say $300/month. With a minimum wage of $15, you'd need to only work 20 hours a month to afford that. Double it to account for taxes. Figure they have EBT for food. Assume they're able to use a platform like Reflex to pick up retail shifts (like driving for Uber but for retail).

With zero zoning, there's no telling how bad the capsule to bathroom ratio would be, which would make them unlivable, but as a thought experiment, it says that there is some price point where it's possible, so the real question is to find what's practical. If the choice is between a plastic tent exposed to the elements with no water, sewage or heating/AC, electricity, and an uncomfortably small hotel room with a shared bathroom, I'd rather the hotel room.