Do you have a local ASPCA? They can provide emergency vet care and give you a low-payment plan, OR you can surrender your dog to them so they can save his life, if it seems very serious. If it smells and it's oozy, it is probably seriously infected and it could kill him. Really, would you rather keep your dog and watch him die, or surrender him, save his life, and allow him to be adopted out to a home that is able to pay for good food, good shelter, and vet care? It isn't your vets fault, most vets (especially in small towns) simply cannot afford to offer low payment plans. That's why low-cost SPCA care is out there.

Honestly, caring for a dog is VERY expensive. Reconsider owning dogs until you are financially stable. Do you have any idea why the collar caused such severe cuts? The collar should be loose enough to slip 2 fingers between the dogs neck and the collar. If it's kept on 24/7, it should be flat nylon material, NOT a chain or a rope. This obviously didn't happen overnight, so we aren't being "assholes", we are justifiably questioning whether your family knows how to properly care for your dog. Make sure you educate yourself about dog ownership, it's like caring for a toddler for 10-15 years.