Hi Dave, I have neuropathy, fibromyalgia and other several other issues; I totally understand your situation. Recently while hiking we ran into a ranger who had a tiny (4" x 4" by 1 1/2") oxygen concentrator. He said it was the only thing that allowed him to continue hiking given his health issues. I was so excited, I have asthma along with everything and hiking has become a struggle. I haven't looked into the cost yet, but I plan on talking to my doctor. Keeping moving is so important, and being out in nature so healthy for our spirit and emotional health. Best of luck to you!!