My dog has a large growth taking over his mouth

Hi I’m David hard working guy who just relocated from Scott’s valley CA where I was working at the local Nob hill

as a cashier and just recently discovered my dog had a growth in his mouth as we found out we had to move suddenly to move to East Palo Alto. He had surgery once already to remove the mass and 3 teeth including a large front k9. The mass grew back within a month and now is bigger then it was originally and keeps growing. It can be one of many things maybe even cancer we are not sure. The vet bill will be between 3100$ and 3800 from the vet at Best Freinds animal hospital in San Jose off of the Cottle Exit. I wish I did not have to reach out but I love my dog and he has many many years left or love to give. Many know Moomoo he has been everywhere with me. As the mass slowly grows Moomoo so far is pretty much as cheerful as ever he eats as usual, drinks as usual . Mainly he can’t play as he used to or chew toys. At times he does seem to be in discomfort but he is 11 his 9 other siblings ( I do not own) are for the most part ok of the ones I still know of. This is why I say that I know he has plenty of life and years in him. I call it his “bubble gum” so I can make like of it and keep in good spirits around him. But the mass must be removed asap I can set up an appointment I already had a consultation with an estimate. Help. Please. If you know me I’m selling audio. I can do odd jobs I’m also selling a motorcycle and just about anything that someone will buy from me.