I was 49 and given a very similar verdict.
Acute Lymphoblastic Leukemia and only chance to survive was a stem cell transplant from a related or closely matched donor (neither was available). I ended up being an experiment having a transplant using my own cells.
I hear you on getting things in order, I even asked a couple members here to help my wife sell our car if I was no longer around. I sold off several of my "possessions". Some I wish I neved did.
I received cutting edge treatment at ucsf and am here today because of it.
I'm not suggesting making any changes in your treatment, but I can say from experience, buy into Doctors you feel comfortable with and let them do their work and do exactly what they tell you to do.
Most importantly fight for your life. I did not accept that I had no hope. I fought all the way and now am closing in five years out from my sct.
Every day is a great day. Remember that.
Hang in there Steve!