Please help Bentley he is sick needs tail amputated

Hi, my name is Barb and I am doing a GoFundMe for my 9-year-old dog, my baby boy Bentley. He has a tumor on his testicle and what's called happy tail, which isn't so happy. He is a very sweet boy. He takes care of me and my seizures; he knows a seizure is coming before I do. He's just priceless to me and I would really, really appreciate some help. Thank you in advance. Surgery is scheduled for Thursday I'm hoping to not have to postpone it! Is considered an emergency surgery