Help D.O.G. with his medical needs

This is D.O.G  hes the most caring and loving dog. He’s the most happiest thing alive. Yesterday we took him to to an animal hospital because we noticed his genital area are swollen he was crying as he was walking, he couldn’t sit, we noticed he was very uncomfortable so we rushed him to the vet they told us it was either a tumor or cancer they told us it would be $900 just to get the bloodwork and testing for a biopsy done not including the surgery and right now because after the holidays my family and I can’t afford that. We cannot sit here and watch our baby in pain. We are asking for any help to get D.O.G out of his pain and back healthy. From the bottom of our hearts thank you so much my family and I really appreciate it!!!!