Wanted to add more from my own personal experiences. My brother was in and out of shelters and living on the streets for yrs. My parents provided a stable home life...nobody was tossed out and so on. He just wouldn't get a job and when he did he only kept it for a very short time. Everyone tried to help him but his reasoning/attitudes were not compatible with normal adult living. He didn't want to start a job at the bottom and work his way up...he would'nt go to college....skills education. He wanted to do his own thing...one day he just vanished. As a adult living at home parents can't do much. Every few yrs he would pop up...show up at my parents home. They would take him in....feed cloth all medical needs glasses and so on. They only wanted him to get a job and begin the process of growing up. The rest of us were all moved out married with families and this cycle continued until he was 45 or so. Sometimes one of us would spot him somewhere...hadn't seen him in several yrs...I ran into him in the same row at church one day.
I would pick him up at the room he was renting and bring him with me and my 3 little ones at that time. Thought finally he was getting it together....then poof....disappeared again. People he rented from had no idea where he was...he'd just left all his possessions and disappeared. Missed all kinds of family events and deaths. Drugs/alcohol and living the homeless lifestyle is what he was doing.
You can try and try and do for your kid like my parents did but when they become an adult you really can't do much....unless the court gives you authority over them and deems them mentally incompetent. He wasn't that...just had different ideas on how and what he was going to do with his life.
He came home again about 45yrs old....and completely changed this time....except he still wouldn't humble himself and get a job say at fast food place anything just to have some money. 8yrs went by like that....both my parents got sick and passed away....the house was sold...he finally got a job and moved to a apartment. They left him some money...hopefully he will keep on the straight and narrow. Is now into fitness and eating healthy last time we talked at a family wedding.
It can change/turn around but it can never happen also. There was no reason for my brother to behave this way...truly. He is not mentally ill....physically injured....he simply never wanted to do things they way the world works....like the majority of us choose to do. Sleeping under bridges...eating out of dumpsters....shelter living didn't bother him enough to make him change. I just hope/pray he never goes back.