I am so glad you are going to be able to bring MooShoo home where he belongs. I am a firm believer in this. I had my niece pick up Taz for me when he was ready to come home. And my brothers dog sat at the vet for weeks because they couldn't afford to pay the bill. So I paid it so that Boo could be home where he belonged. The family was very grateful.
My vet also required payment up front. So while I'm standing there in tears after letting him go, I had to pay for the services. I guess every vet does things differently.