!! Agree!
If my cat needs to travel to NL or other EU European countries , his vaccination need to be up to date (less than a year from the last vaccination). I remembered rabies shot should be done in an interval of a few days to a week. I don’t know exactly for dogs, but I guess it should be the same. My cat has a passport (health)! I believe (not 100% sure) that if you don’t shot the pet, they would be locked up in NL for 3 months to be cleared or be refused to board the plane.
Maybe you have cheaper vet? I can’t believe the price!
I know that you need to buy cage conforming to the standard of travelling on airplane. Check with airline company.
Ask him to pay, it’s his request!
I have heard some tragedies concerning pets travelling on planes, sometime errors like they were checked in as baggage with no heater, or the pets got lost with loosen cage door etc. Find a reliable airline with good reputation with pets.