Save Roger: Surgery for Our Loving Cat

We got Roger in January as a stray. We started noticing a patch of skin was unusual under his nose before we went on vacation. We didn't think anything of it, and when we got back, we realized it was way bigger. We took him in, and they prescribed medicine to try, but there were no promises it would work. It began growing rapidly and is very large now and keeps getting cut open. We have a choice between doing surgery or putting him down. We absolutely do not want to put him down. He is the sweetest, most loving cat you will ever meet.