My point is, you can employ them by donating to them in exchange for prayers. A very informal "Little Brothers of the Street," if you will.
Back when I parked behind the Union Mission in downtown, I had a very interesting running conversation with a regular habitue of the mission who was a Sola Scriptura, "once saved always saved" guy. We went round and round, but we always had a good time. We'd pray for each other, and I'd help him out a little, and he kept an eye on my car so that nobody broke into it.