Super Puppy's severely broken leg

I'm not used to asking for help like this.  Ok...here goes.  I have two beautiful goldendoodle puppies, one named Parker that just turned 1 years old last Friday and the other named Milo that is 3 months old.  They are awesome brothers and have been a lot of fun.  Last Saturday evening Milo, in his puppiness decided to test the laws of gravity and take flight from the back of the car through the window.  Well...it didn't end so well.  Milo severely broke his left hind leg up close to his hip.  I immediately took him to the animal ER and have nursed him through the last couple of days until we could see a surgeron.  That's right, Milo did it up good and needs surgery to repair his leg.  A simple cast and rest isn't enough.  

I was amazed to find out that the estimated cost of this procedure will approach $7,000 (written estimate from the hospital).  We only have two options; get it fixed or...I'm not thinking about the "or" right now.  Not doing anything will cause a lameness that just wouldn't be fair to him.  The orthopedic vet hospital requires payment before procedure and I'm kinda short.  I feel so horrible that this happened to him and am coming to grips that this was truly an accident.  I love my pups to much to be neglectful and the windows are usually down a little until we get moving. Nonetheless...it happened.  

If you can help I'd be eternally grateful; but even if you're not able to, please say a prayer for Milo and me.