Is there an "afterwards?"

I don't know if there are "one time" or "one shot" solutions. Certainly there are some unhoused that can be helped by that but I'm under the impression that most have issues that go substantially beyond a one time check or a pill or a one time treatment.

Yes, exactly right. That is where they can learn and establish structure in their life, and build a foundation. These were once referred to as Independent Living Skills. Once taught and established, then they can hopefully translate that into a healthier life on their own.