My only experience with the homeless was doing a very long all day sports clinic in Dallas years ago. And being free to the public and downtown, we had a lot of homeless guys. 100% had a lot of alcohal in them and a few were obviously mentally ill.
From my veiw, I don't know if would encourage any type of firearm ownership for these folks. However I'm sure your knowledge is more intimate.
To answer your question:
Knowing what I know of Raven, Lorcin, and Davis autos as far as dependability, I would pass and get a Davis Derringer or a used Italian or German one.
If it had to be an auto, I hate to say it, but American Handgunner did have a good write up on the Hi-Point. Of course it weighs 3 times as much as well as being 3 times as big and costs a little more.
Just my veiw from the saddle