I agree with everyone above. Take him to a second vet as soon as you can, and do what you have to to get Spaz taken care of. If you have some animal-loving friends, ask them for names and numbers of vets they recommend.

I also second the recommendation to check for CareCredit. I got that through a vet's office last year, which helps me pay for vet bills (plus dentist bills) over time but with no interest charged if you pay it all off within a specified amount of time, and I've gotten up to 18 months on some bills.

Prayers and good wishes and healing energies are being sent for dear Spaz!