Is that ignoring all the homeless people in the states, the people living in trailers, in their cars and so on while working multiple jobs?
You can look this all up.
While there are homeless and people in trailers, on average it’s because (a) they’re drug addicts who don’t want to live by their own rules (b) people living cheap, trying to get ahead or (c) Elderly, often inept, people who get trapped.
Trailer parks are particularly bad as they lock you into (effectively) renting. Outside of a few major(poorly run & corridor) cities, eg Chicago, SF, LA, NYC, etc the homeless rates are relatively low.