You will need more than a passport. The biggest hurdle is to demonstrate that you all possess enough funds to live here without working. I retired here after selling my medical device company in Florida, USA. This is the name and number for an attorney that I have used in the past. If he can't help, he will recommend someone who can help.
MAISONNIER MICHELE, AVOCAT
Imm C.Levy, PAPEETE, TAHITI
Country Code 689, Phone Number 40.42.44.74
Good luck.
Steve
Manarii Tane, (my Tahitian name)
Papeari, Tahiti, PK 52