Atlas remaining medical expenses

My dear Catahoula Dog Atlas was diagnosed with Liver and Bone Marrow Lymphoma in December of 2016 at age 11. I decided on non invasive treatments with quality of life as my premium objective and I was blessed with almost 28 weeks of wonderful time with him after a prognosis of 9-12 weeks. Needless to say this was quite expensive. Now that he is gone I have over 3k in expenses to cover. Being a senior on a fixed income this is not an easy task so I am posting here for whatever help I may generously receive. My sincerest Thank You's in advance.
Greg