<p>Any one of the suggestions given are not going to help the problem. You look for choices. There may be a program that addresses issues that the young man has, and it may be in a school. I know that here we have a public school that takes kids with behavioural and emotional issues beyond age 18. Now because he has a GRE that may eliminate such options, but an educational consultant may know of progråms that could be useful to the young man. Going to an inexpensive community college for a fun type course that still gives credit can give the young man free access to mental health facilities on that campus. There are local colleges here where you can take single courses, and use the counseling resources.
In our area, we have career training courses paid for by the state in such trades and occupations as HVAC, nurse assistant, etc. So, yes, the education route can uncover some low cost or even free programs that måy be palatable to the young man. Starting one of them is a good reason for a complete physical, and he may not object to that whereas just telling him tha† he needs a check up, mental and physical because they think something is wrong with him is not a good tack. It is a monumental job getting these stuck in mud kids out doing anything. Short of sending the men in the little white coats, if you even can, there is not much you can do with a non minor who is not is just not doing anything. You need a little movement in some direction to get started on an appropriate path. You aren't getting anywhere while he is vegetating in his room.</p>