I'm sorry to hear that Kiwi is sick
You MUST keep her hydrated at all costs. Please get a syringe and force the pedialyte into her, it will save her life until the vet can figure this all out. It may be time for a new vet if this one seems uncaring, but he may be downplaying to help you keep calm.
It's horrible to have to think about money at a time like this
I'm so sorry. Try speaking with the vet about it, they shouldn't be charging you $200 each visit for the SAME illness that THEY can't figure out
Hopefully they'll cut you a break, but they will only do that if you speak up
Healing prayers going up for Kiwi