I'm not being mean but it needs said. You can't do rescues if you can't afford to do them dear. It's not good to take a snake out of a bad situation if you can't improve that situation. Call your herp vet, explain the dire need to see him/her as this snake is in a very bad way. Your vet will hopefully work out a payment plan for you and a lot of vets will give discounts for people that are doing a rescue/rehab. This snake needs to see a vet. If you can't manage it then you need to find a rescue organization that will and it must be very soon.