You do have a long list of ailments - yet, I can "hear" your spirit and I admire it/you.
Fortunately, I do not have any disabilities - but my sweet hubby has heart failure, diabetes, asthma, and undiagnosed GI problems. He is hearing impaired and wears bilateral hearing aids. He is insulin dependent and wears an insulin pump. He too, is an old Vietnam vet, and many of his problems are due to agent orange exposure.
He is 100% disabled and unable to work. Sometimes its all he can do to get from the bed to the chair. But other days, he is able to go to the fishing hole, sit quietly and catch those little buggers!
I do my best to take care of him and we are trying to live each day to the fullest and enjoy life the best we can. We know that his life will be shortened with all these ailments, so we have to pack in as much as we can during the time we have left. I guess though, that could apply to all of us!