Good morning, @lag630 I know from experience this is an unsettled time for you and your husband. Not the way you’d expected to be enjoying retirement, right? My husband and I went through the same scenario. Life was going along just fine and then, out of the blue, I developed AML (acute myeloid leukemia) 3 years ago. As my only option for a future I required an allogenic (unrelated donor) bone marrow transplant which has, indeed, been a life saver! I see your husband will also require a new immune system to put things right. I will admit it’s no walk on the beach but it is doable and one heck of an experience! And a means to giving your husband a second chance at life. ☺️

It is a complex undertaking so it’s best to have this procedure and follow ups done at a hospital/clinic which specializes in bone marrow transplants.
Are you living near a large hospital that specializes in this procedure?