--what might the dietary/supplement/exercise options be, to minimize bone loss and see if we can wake up some of the cells?

Can you put together a weight-bearing exercise program of any kind? What will your sinews/muscles tolerate? (Light weights/high reps?)

And (I'm sure Mrs. D will have suggestions here)--what kind of calcium/magnesium/Vitamin D3 regimen would optimize your bone condition?

BTW, I certainly empathize with your situation, and absolutely want you to avoid the kind of bone breakdown that Billye is suffering, but you're wrong about one thing. You also carry off these situations with grace. Maybe wry, sarcastic grace, but grace nonetheless.