Lung Cancer Stage 4

When my husband, Brian, started coughing a great deal in January 2016, I suggested he see a doctor. He declined. Over the next couple of months several other family members pointed out his cough. Without asking him, I made him a doctors appointment.  On Friday, April 29, 2016 we seen the doctor. I ask he do an xray of Brian's chest, more so I could stop my worrying.  The xray was done and we left the office.  Within 10  minutes of leaving the office the doctor called and said "I don't know what you have planned for the next week or so, but you need to cancel it."  He gave us his personal cell phone number for the weekend and started making us appointments.  The whrilwind began, over the next week, there were many tests, including a biopsy.  On May 13, 2016, our first visit with the Oncologist, it was confirmed, only much more severe than we could have dreamed, Non Small Cell Lung Cancer Stage 4.  Our lives were shattered and in complete disbelief with a lack of understanding why...  
I must explain. You see, Brian and I are not your usual husband/wife combo.  We are an example of what real love and marriage is. We have never had a fight, we always put one another first, we have always loved like there is no tomorrow. We have been told we give others hope of finding love, that ours us unlike anything they have seen, they want what we have, ours is one in a trillion........so how could we be so blessed in love setting the standard of an amazing marriage for it all to be ripped away!  We just couldn't and still don't understand.  
The following week we started Chemo and every third Friday, more Chemo. Every Chemo treatment visit at the hospital is $25,000. We have insurance however, we are still responsible to pay our share.  He also has a chest CT every thrid month.  His last one was January 31, 2017......the results that followed are not good. The doctor explained to us how the cancer has out smarted the drugs and it is growing.  Brian and I both cried and I told the doctor how Brian is my whole life, he has to save him.  Yes, I suppose he hears that often but even the nurse commented "I can tell you two are different".  Doctor said Chemo is done.  We are now waiting approval for immunotherapy.  Immunotherapy sounds promising for extending Brian's life but the stress comes when you find out the immunotherapy drug cost upwards to $90,000 per treatment.  He will need a treatment every third Friday.  All things line up, his first treatment is Feb. 21.
I never want Brian to choose to die because we can't afford the co-pay.  He is an amazing husband, one in a zillion, he would rather choose death than leave me with millions of dollars in medical bills.  I understand completely Brian's love for me as I would choose the same.  What I still DON'T undertand is why a great love has to be ripped apart.  We are so young, we wanted to grow old together and continue make the world believe in love.