First, and this is from a rescue person so I swear I'm not out for blood. Do you know where the dog came from? Its owner is liable and rabies info needs checked or it needs quarantined for 10 days. Otherwise your friend is looking at a painful series of shots. I know this seems unimportant right now, but it is important I swear.

You can apply for care credit at most vets. It is a credit card, but it may help alleviate the immediate worry as most vets won't do payments any longer. Your best shot for help is a rural vet, but do the care credit.