CT scan for Izzy

Izzy is my horse, recently she has become I'll with a nasty aggressive bacterial infection of her sinus that after 13 weeks is still unresolved and has now begun attacking the bone. I have exhausted all avenues of my own accounts and insurance to cover an already mile high vet bill ($22,000). I am going to sell some unnecessary gear that I have collected over the years to help pay my bill and have been very reluctant to reach out to the public for some support as we all know ultimately horses are a hobby. It has been recommended that Izzy have a CT scan at massey university of her head to try to pinpoint exactly how much of the bone is affected and to see if we can clear this infection for good. Her prognosis with this scan is good and while she is in good spirits still I'd love to continue to help her where possible. The story is long so ive kept it short and sweet, the total I will need to find for the round trip from auckland to palmerston north and back incl the CT is approx $5000 so any extra helping hand would be so greatly appreciated.