My mom (87) was diagnosed with esophogeal cancer in April 2008, and had only one growth at that time. She had trouble swallowing and had a barium swallow, then an endoscopy that showed the growth. Her cancer was also inoperable due to the location and her age.
She successfully went through chemo and radiation, and that cancer was gone after about 6 weeks. Unfortunately, with her compromised immune system after chemo, she contracted c-diff, which causes diahrea. It took 3 rounds of a very expensive medicine over 6 months to get rid of c-diff. I hope you avoid any infections while your husband is on chemo or afterwards.
Mom had several really good months then this spring and early summer. Then, she began having some swallowing issues again, and there were several new cancers growing and that was what we had been told by our oncologist (very high likelihood of returning).
A few weeks ago, mom decided to have a stent placed to keep her esophogus open - not sure that was the right decision yet. So mom's still with us a year and a half after the initial diagnosis, and is still living at home and doing pretty well. We don't know what is ahead, but she has surprised all of the doctors on how well she is doing.
I don't know about the additional cancers you are facing, but I wish you the best. It's really hard, but on the positive side our family has really grown closer during the last year. The caregivers have been wonderful, and they have made a big difference too. We've been able to talk about mom's wishes that we might not have known otherwise.
So sorry.