No, lean is insane at 250. But purely strength and weight, he could do it.
Anyone and I mean anyone under reasonable height can get to 250 lean(single digits) with the right amount AAS, pharm grade GH and slin. It might not be pretty and you damn sure ain't gonna look like a pro but u will be big and ripped AND BROKE
OK - I need a two second education as I train at home and don't use "supplements", so my knowledge of that area is very rudimentary.
What is slin?