Cancer Treatment for Snoopy

Our 12 year old cat Snoopy is going to an Oncologist soon to look at possible treatments for the tumor growing in her mouth. She is now on heavy narcotics for the pain and I am force feeding her, trying to get her strength up. We don't want to say goodbye and put her down. Our goal is to look at surgery or radiation and get her through this.
We are a family of 3 with 2 senior cats and 2 guinea pigs. We are struggling as it is with one income. My boyfriend works very hard but it's not enough for this emergency situation with his little girl Snoopy. 
We need help paying for Snoopy's tests and treatments. Please help if you can.
We are praying for a miracle and need our community of animal lovers to help us. Thank you so very much for your love and support.