My thoughts and prayers go out to you. I was in your shoes just a few months ago. My father who is 74 was diagnosed in August with NSCLC and although the tumor has barely shrunk, his pneumonia and general health seems to be improving. The doctors last month said they suggested hospice due to the minimal change with the chemo. It snowed this week and my dad was shoveling snow at 74!! You need to have faith and pray as much as you can. He has to stay positive and I suggest that he look at complimentary therapies. For example, my dad uses an infrared hot house 4 hours a day and minerals supplements and a PH balanced diet. I now understand that if your body (which is 80% water) is not balanced, it will be like the swimming pool with a ton of algae. Cancer thrives in that environment. After each Chemo, he sees a homeopathic doctor that does a few therapies and he has no nausea, fatique or loss of appetite. He only takes water soluable supplements and a ton of them. I suggest you look into "Eniva" www.eniva.com. I also suggest a book called "Beating Cancer with Nutrition" by Patrick Quillan and "I Beat Cancer" from Awareness Publishing. You will read stories of hope and read the story of 50 people who beat cancer. Please know that there is hope. It will take a lot of time and commitment with all the family members and totally worth it.
Honestly, Lung Cancer is seldom curable (according to the doctors) but don't let that get him down. Doing these additional therapies will help keep his immunity healthy and when you feel better, you have hope. I know there were times when my father just wanted to give up because he was tired of suffering...that has changed 100% since we have made this commitment to the alternative therapies.
I will keep your father in my prayers.