"It's just unbelievable how much good will we've had."
Mr Christian's niece Hayly Darlow said it was going to be difficult getting enough money together to get his body back to New Zealand but locals had pitched in to help.
New Zealand aeroplane operator Peter Vincent Aviation had also flown the family from New Zealand to Vanuatu free of charge.
Ms Darlow said Vanuatu was her uncle's idea of paradise.
"He had amazing friends around him. Just the amount of love in this community for him is crazy. They're all devastated."
Ms Darlow said the family was trying not to dwell on how he died.
"That's not what uncle Hanz would have wanted. There's nothing to be done now so we celebrate him for who he was, not what happened to him."
Mr Christian's body would be returned to New Zealand on Friday and taken to Whangapoua on the Coromandel Peninsula, where the former navy diver would be cremated.
Police in Vanuatu have arrested a 30-year-old man in connection with the incident. He remains in custody while the investigation continues.