Looking for help, advise, and or opinions

I'm so glad I found this site. It is comforting in a way to know I'm not alone. My son is going to be 22 this June. We adopted him as a baby at six months old. He's our second child that we adopted. He has always been a very intelligent child.  Learning came easy to him and got good grades. In high school he started gaming more and more. And assignments were missed but he always had an excuse.  He did manage to get a full scholarship for college and even though he did not really want to go away to college we gave him no other option. Needless to say he  failed the first semester. And the second semester I believe he just didn't go.  We did not give him an option of coming home we told him he would have to get a job and pay for his own way. He did and was living paycheck to paycheck for about a year  until he got fired. I helped him out with his rent for a few months then told him I would no longer be doing that and to try to get out of his lease. He said that he had taken care of that and asked if he could come back home.  I didn't want him to live in my house because of his personal habits or lack there of.  He is also a compulsive liar. As his mother I of course wanted to believe his lies and did at times but I have learned the hard way not to believe him. We purchased a small trailer for him to live in on our property with the understanding that he would get a job and  pay us rent.  My husband found him a part-time job which he was not wanting or excited about but managed to keep it for about six months.  It did not make enough money to pay us anything he did manage to keep his car insurance paid but then got fired from that job.  I felt he was suffering from depression and he unwillingly did some online counseling sessions and reluctantly took antidepressants for a short time (not sure if he actually took them) Looking back I'm not sure if the gaming started because of the depression or if the depression was because of the gaming.  I wanted to help him get back on his feet and that's why we had him living here on our property in the trailer so that I knew he was safe and fed.  He has access to a wired connection and was coming into shower  and I gave him food.  I now realize I was enabling his addiction. I have cut off the wired Internet. He still has access to wireless but I don't think that is good enough for  his gaming. Now that I have cut it off he refuses to come in and shower or accept food from me. I think it is his attempt to starve himself.  He has no friends other than his online "friends. "These online friends have paid for his computer after his computer fried in a power surge.  Right now he has no job. I was paying his car insurance for the past three months hoping at some point he would get a job. I have now stopped that and turned in his license plate to the DMV so he has no car. Right now he is still here in the trailer not showering or eating just wasting away. Bills are piling up turns out he may not have gotten himself out of that lease as we have received a letter from a debt collector looking for that money.  I cannot justify spending any money on medical help for him as I feel it would be useless because he doesn't truly want it. So I will not pay the bill from the doctor visit when he got the antidepressants.  Not only because I really don't want to but we are really not in a financial  situation where we can. I know this addiction is the cause of his behavior and I'm guessing you all know how I'm feeling as his parent wanting to help him in some way and knowing in my brain I can't but my heart still wants to. What do I do? One post I read on here said give him some money and take him to a homeless shelter another to call police. Anyone who has done something extreme how to you cope with not knowing if they are safe? Please give me your thoughts and thanks for reading.