Linda, I'm sorry you're going through so much. I think the hand surgery, while scary, sounds like a good step for you, considering how much pain you've been in for so long. I know nothing of the recovery time though.

As for your foot, what imaging of your foot have you already done, if any? Xrays do often miss stress fractures until they've started to heal, but perhaps that would be a cheaper place to start. If it turns out to be a Jones Fracture (base of the 5th metatarsal) then I'd want to know if it's likely to recur based your biomechanics. There are surgical options for that if you're prone to stress fractures in that area.