Dog hit by car

[DeezNuts]

Yesterday our(my roommates and mine) puppy(1 yr old terrier mix) got out of the house and yard and was hit by a car. A neighbor came to the door and told me that she just saw a little dog dragging himself by his front legs under our gate(which is how he got out into the street) and into our yard. He was able to get out of the house by pushing open a door that I didn't know he could push open. The car that hit him must have not stopped, although I didn't ask the neighbor any details(if she witnessed it, what type of car, etc) due to my tunnel vision of just finding him and getting him some care at the time.

I found him crying and unable to stand on his hind legs at the door, but there was no blood or cuts. I called emergency animal hospitals and found one and rushed him there, where they took x-rays. These showed that he had multiple fractures of his pelvis, but no other significant injuries and kept him overnight. He is now awaiting surgery by a specialist on Tuesday, but they think he should be fine after surgery(cost~$3k, is this around normal?).

Has anyone had something happen like this to their dog? How long was the recovery time? The doctor said that we will have to crate him so he can't run around too much for 6-8 weeks and can only take him out to the yard on a leash for the bathroom. Also, we were told that he may develop complications down the road such as arthritis or lameness in his legs. Anyone have any experience with this and how did it turn out?

He is pretty hyper and active, so I know the downtime will be a real bummer for him, how do you/he deal with this?

I feel so bad for the little dude, but when I saw him as I was leaving the clinic, he seemed properly doped up and peaceful.

Just wondering what to expect and the probabilities for complications and after-care. Thanks.

DN