Help Dodge

This is for my sons dog Dodge, he is a purebred English bull dog 2 years old. He was hit by a trailer (too short to be seen) on Sunday and has been unable to move since then. So far my son has paid our 450 for x-rays and 200 to see the specialist. He has just been told he needs a CT scan at an approximate cost of 1200 just for the scan on his elbow and an operation which is estimated at 4000. I realise putting him down would be cheaper but Dodge is part of the family and a family pet to my sons 6 year son and 2 year old daughter. He has just had an operation to remove a metal spoon he ate last week at a cost of 1400