Help Remington get surgery

Hi, as many know, Remington is my dog, I adopted him when he was 1 and a half years old from his original breeders. Rem is now 5 years old and has been my absolute bestfriend since day one (he even chose me as his person). I don't like to ask for help however he has a mass in his rectum, which has been known since January 2021, we tried originally to put him on meds and that helped for a little but has since stopped helping as much to the point of removal being the best option, which needs to be surgically removed by a specialist. I need help with the cost of it, anything helps.

This pandemic has hit me and my family hard as we lost 2 members to Coivd in 2020, I don't want to potentially lose my best friend too. 

Thank you.