Pat... wish I had something more to offer than the power of my hope that all goes as smoothly as possible for you.
Actually, perhaps I do. My experiences as a parent and as one who often thought suicide was on my agenda.
There have been times in my life when I just had to look for the lesson, no matter how unclear or unfair it may have been, there was one... only thing I thought of here was... perhaps you may need to find away of putting yourself first in a way that is often difficult for a parent to do and allow your son to receive the gift that comes from learning from his own struggles... and from that, a greater sense of self reliance.
As for your son, perhaps my brief story will help... I went from wealthy to welfare (for the last of many times) at 45. Found a way to take that on as a challenge... went back to college (last formal education was as a grade 8 drop out) and quickly discovered that to truly find myself, I had to lose everything... I was like a bad country song... lost my money, my girlfriend and yes, my dog and the pickup truck...
I can also honestly tell you that I now look back at this as the best time in my life because, perhaps for the first time in my life, I accepted responsibility for myself and from there grew in to someone I didn't know existed, a person who could look in to the mirror and respect the person he saw looking back at him. This comes from a man who was once delivered to the psych ward by the police to protect him from himself after a lifetime experiencing waves of suicidal thoughts. No, it wasn't easy, quick or painless... but it was above all worth the journey.
Hoping I haven't overstepped myself...
Rick