I believe it's his right whether or not he attends college. There is nothing wrong with him being a "laborer" and here in the U.S. some of those guys make good money. Of course, it could be dangerous if he is high while working. It sounds as if he is not interested at all right now with stopping smoking pot. Besides the worsening of the family relationship does he have other negative consequences? Any legal or mental/physical problems with smoking weed?