Hi Annieslp,
So sorry to hear about your dad. I hope that you and he are bearing up well, and that at least he is not in serious pain.
Please bear in mind that most of the people of this forum are myeloma patients and family/friends of those with myeloma. Although we generally have experience of and knowledge about myeloma, we are not (generally) medical professionals. You are asking for a prognosis, which is something that even doctors would hesitate to give.
Having said all that, how is your Dad now? Can you give us info please (so we have something to go on), such as myeloma stage and some blood test results. How is he responding to steroids?
Regards
Rabbit