Just a thought. After lung cancer surgery I had multiple lung problems, I was however an active YMCA member who attended 'chair aerobics' classes with my oxygen on. (I am 73) When my Dr. suggested pulmonary rehabilitation classes, I went to about 4 and decidedd the group chair aerobics class worked better for me, because I needed the group support as much as I needed the exercise. If you can't find a rehab place, maybe the y(or any gym) would work for you too. The mental burden of realizing that you might never again be the person you once were is really devestating. He is fortunate to have someone like you who cares.