Calling protective services wouldn't have accomplished anything. Wèens and trolls have called everybody you can imagine while trying to bring the law down on Chris, and it's never worked. There is a whole thread started by some college kids in Minnesota who tried to call in a wellness check on Chris, only to be blown off and then mocked relentlessly when they posted it here.
Chris and Barb have managed to effectively sever all their ties with family. Barb's other son Cole refuses to call or visit, and he has Chris blocked on social media. Bob's two kids by his first wife barely spoke to the Chandlers when he was alive, and there has been no contact that we know of with either of them in years. His best-case scenario at this point is either Section 8 housing or a group home, but odds are he'll wind up on the street. Chris is capable of paying everything except for his credit card bills in a timely fashion, but you are correct in saying that he most likely wouldn't be able to manage a house long-term unless he had a wrangler to help him sort his shit out.