Did you want an opinion on if you should make a payment on the dog or make a payment to the doctor? I’m not sure if you are just voicing that you are torn or if you want an opinion.
I think if you want the dog, then you should make a payment on the dog. Do whatever you think is best for you. I will say that I would be sad to see in the future if you can’t get something you need or can’t get get the dog something it needs because of financial issues. I’m not judging you, I know you said unexpected expenses came up that made things very tight, but if those things have been resolved and you are now in a place where you can afford the a dog-then go for it. I also hope that if you do get a dog that you are able to save money for a rainy day. I had to put out almost $2000.00 on my rescue dog since June because she got diabetes. And I don’t know if the vets in your area work with payment plans, but mine doesn’t. I needed all the money up front each time she goes to the vet. So maybe also while you waiting for the dog-maybe research vets in your area? Check reviews of the vets and see if any of them offer payment plans Incase something major comes up with a pup. I know you want a German Shepard but if you have a lot rescues and shelters in your area-sometimes German Shepherds end up in a shelter and need a new home. So you can also keep your eyes open on shelter websites to see if any GS dogs show up. Some do come through the shelters every now and again. Not often-but sometimes they do. Good luck with whatever you decide to do.