Help Treat Honey Bear

Hi friends!  My name is Brianna and I found Baby Bear in the Little Haiti area of Miami. He is the sweetest little dog in the world, so loving and calm. Someone had tried to paint a Mohawk on him with what feels like wall paint, and he has a huge infection on his back as well as fleas and ticks. I have him at the vet currently to get fixed up, but the cost of an emergency visit as well as treatment is already well past $300, and I haven’t even gotten his vaccinations yet. If anyone has a few dollars to share to get the precious little bear back to health, I would be so massively grateful!