I remember the time when you couldthe stove is designed to get hot. wood burning stoves etc. have fire bricks inside, but semi open fronts to let the heat out.
If you insulate it will ast like a rocket stove and have a hard draw, so I cant see it working like most outdoor heaters. they are designed to burn slow and loose the heat through the body.
He will need a guard to stop the kiddies messing with it.
I'd tell him to take a long walk on Dunston Staithes