Hi and welcome!
I do know some families who have gone great distances, yes. But, as you said, you have to consider all factors and make a decision based on what YOUR family can do.
There is a doctor in NZ who might be able to help you, Dr. Tan. Have you been in touch with him? It's closer to you and he might be able to help.
Swee T Tan MB BS FRACS PhD
Wellington Regional Plastic, Maxillofacial & Burns Unit
Centre for the Study & Treatment of Vascular Birthmarks
Hutt Valley DHB
Private Bag 31-907, Lower Hutt
Ph +64 4 570 9067
Fax +64 4 570 9510