there's no professional help back homeThere's not much you can do except get him professional help. When you say back home I'm thinking a dry desert with rocks everywhere and the largest trees are brittle bushes? I'd be depressed too.
I wanna help him somehow but I'm cluelessHopelessness sometimes does this
What does he have to look forward to
You'd be surprised to find out they do exist. You can google them, they are diaspora people who set up shop and work with local orgs. I'm talking of therapists etc.there's no professional help back home