Hi Loopy
Welcome from me too. Sorry your husband has had such a hard time. I was treated with CDT (admittedly not CDTa) and got into complete remission after six rounds. I have not gone down the route of SCT and have been fortunate thus far even though, like your husband, my bones are shot through with lesions.
Mobility does improve. It is just very flow and hard work.
I am a great believer in Zometa infusions (bisphosonates) I put my lack of fractures down to it.
Keep holding on. Life is worth it. Making the most of every “good” day is the secret. Don’t put off till tomorrow what you can enjoy today!
Best wishes to you both.
Mavis