Costello, I'm not trained in psyciatry of psychology. I have talked with many, many psychiatrists and Three psychologists over my years though. One psychologist I saw for close to a decade. The one I have now, I have seen for a couple months. I think they would agree with me that at some point, the "apron" strings need to be cut. I mean, unhealthy maternal attachment can disrupt healthy growth for an individual. Perhaps this was what the Drs saw at the hospital.
You seem VERY worried about your boy, who is in his upper 20s. I think you might want to consider this as a possibility and talk to a professional about it.
I'm regret that I see this, I do see it though, from your posts here.
I think your young man will surprise you at how well he can survive without your assistence. Maybe you should allow him the opportunity to prove his own capability for survival. It might help improve his self esteem.
Just my personal untrained observation.
brook