Please save my dad

My father was 62 years old. He was diagnosed with rectal cancer on March 15 and spread to the liver. The doctors in public hospitals said that because the tumor size is too large (6cm), they cannot be surgically removed. They can only be controlled by chemotherapy drugs, and only One year of life. However, we did not give up. Last week, we found an authoritative Enteropathologist. He said that minimally invasive surgery can be used to remove the tumor and cooperate with medical treatment to prolong the survival rate. However, this operation can only be done in a private hospital. We have not been able to cope with this high surgical cost and drug costs, so I hope to get assistance....