Bring my sister back to NZ

I never grew up with my sister i dodnt meet her till I was 13 because she was born and raised in Australia... she hasn't been able to afford to come back to nz to see her family for 15 years. She lives with with her now 19 year old son and 16 year old daughter.

Here in NZ she has myself plus 3 other sisters a brother an our Mum..... I havent seen her myself for 10 years when I went to oz an I have since then in the last 10 years found my soul mate had 4 children so have all my siblings yet my sister has never met them. It breaks my heart because she is older than me we talk almost daily and always have but nothing would feel better than physically having her here to hug an laugh with an cry with an make those special connections and bonds with all her nieces an nephew's. ....she has alot of pride that stops her for asking for help but at this stage in my life my heart is aching to see my big sister an so i have taken it apon me to set this up.....i myself have saved $500 but it's taken a year to save because as we all know 4 kids an life in general is not cheap nor easy anyway i hope this story strucks a chord with someone or peoples that are able to help me out on my mission to bring my sister back for a month

Thank you all