Help save Brando

My dog was just hit by a car and has head trauma and internal bleeding and needs to stay on oxygen. I cannot afford his total vet bill and they are sending us home with him in critical condition unless I have a way to pay the costs. He is in jeopardy of passing away very soon and Ihave no idea when it could happen. My father just passed away and this dog has literally saved my life I dont know what I will do without him. Please anything helps and thank you so much.