I trust everything will work out in the end for you and your husband.
In the meantime I guess I would try to make the best of things. There must have been some things you liked about the house initially. It might be a good idea to get an an energy assessment to see if you could do something about your utility bills. Could you turn a downstairs room into a master bedroom? I can relate to the bad knees - I keep meaning to get back to swimming - it's helped my knees in the past.
I wish you the best with it- just know that you will eventually get a house that really feels like home.