I am heartbroken.
I maintain what I said already, the boy is not rebellious. If he were rebellious he would shave, buy new clothings, and find himself a job and a girlfriend. We may dislike it, but (assuming halacha were to be violated) this is between him, himself and Hashem. This is not the case. The boy has expensive hobbies and no way to support them, and is not seeking for one.