Help Pippin Walk Again

Our 7-month old puppy, Pippin, got very scared of fireworks tonight (July 8th) and as I was going to calm him down he bolted out of the yard and ran into oncoming traffic. He was struck by a vehicle very hard, and broke his leg very badly. This happened after normal vet hours, so we were forced to go to an emergency vet. Just to get him pain medications and an overnight stay, we had to pay about $1200, and in order to fix his leg it is going to be an additional $3,000-$4,000. At this point, we think our only option is amputation, which will still be an additional $1500. We are hoping to raise enough to fix his leg, but if we can only get enough to amputate then so be it; I would rather have Pippin with 3 legs than no Pippin at all. Anything at all helps.