Help my dad beat stage 4 lung cancer

Hey y'all for those of you who don't know us, my name is Angie and my dad Marcus was recently diagnosed in July with stage 4 metastatic non-small cell lung cancer. The prognosis with conventional treatment was not one we were going to take, so we went on a search for a different route. After much research, we came across a medical facility in Scottsdale, AZ called Envita and we thought is was a perfect fit. The only issue is that insurance is not accepted because most treatments are holistic with low-dose chemo. The total cost of his treatments,surgeries and medication will be about $180,000, and my parents since august have been paying for everything from their retirement. He is doing well so far and has made incredible progress, but my parents are running low on funds. We dont want to stop treatment as it is working for him. on his recent PET scan, they can no longer find the lymph nodes that were once showing cancer, and the tumor on the right lung has decreased from 7cm to 5cm, so stopping treatment is not an option. We never thought we would be in this position as most people do not but here we are, and I'm just trying to find a way to help my parents out. They did apply for medical loans, but they take forever, so in the meantime they have to pay everything upfront. i know right now everyone is hurting so anything helps and if you cannot donate we surly appreciate prayers.