Her grandmother was unable to afford funeral insurance - in fact, she had not long paid off her mother's funeral.
But she was often out of pocket thanks to her boundless generosity: opening her home to troubled youth, spoiling the neighbourhood children, and pouring all her resources into her family.
"Nana would give anyone the clothes off her back, and want nothing in return," Ms Mount said.
"I don't want to give her a shitty funeral when she has touched so many lives. She deserves the best send-off ever."
Ms Mount has always been close to her grandmother - from spending hours drawing and baking together as a child, to planning Raewyn's hen's night as an adult.
"We'd be together every day, just drinking coffee and talking for hours.
"She'd feed me when I had money problems, and I could tell her things I couldn't tell anyone."
Ms Mount said Raewyn was a stickler for discipline - which helped inspire the at-risk youth she would host in her home.
"We'd call her place 'The Half-Way House.'
"She took in these teens nobody wanted - she'd teach them to cook, give them strict rules, and it'd change their lives.
"She'd say she'd never do it again - but then there'd be another teen in her kitchen."
Neighbour Ms Wyeth calls Raewyn her "second mum", and said she literally saved her life.
She had been putting off her cervical smear test when Raewyn challenged her to accompany her to her own appointment - and Ms Wyeth's test result showed major cell abnormalities.
She needed 80 per cent of her cervix removed to prevent the pre-cancerous cells from spreading.
"I was 24 - I thought I'd be all good. Had it not been for Raewyn hassling me, my daughter might not have a mum."
Raewyn has also been a lifesaver for Ms Anderson, looking after daughter Indyanna after school, as she and her partner work.
"Nana Rae" would accept only $35 as payment which she'd use to spoil Indyanna.
"Whenever they'd go to the supermarket, Indy would come back with a new bracelet or hula hoop. She'd just converted a whole room of her house into a playroom for Indy and the neighbourhood kids - they adore her."
It was Ms Anderson who took Raewyn to hospital on April 30, where an ultrasound confirmed cancer of the stomach, liver and lungs.
Raewyn was transferred to Wellington Hospital, with the prospect of surgery prolonging her life but as soon as Ms Anderson had "pressed submit" on the Givealittle page last Wednesday, she was told there was "nothing they could do".
She said she feels "empty" at the thought of losing her friend.
"Telling Indy Nana Rae isn't going to get better was one of the hardest things I've had to do."
While she is "heartbroken", Ms Mount is determined to make the most of the time her grandmother has left.
"She can still smile, laugh, hug and tell us off - and that's what I'm focusing on."
To donate to Raewyn's family, go to givealittle.co.nz/cause/helpraewynfightthebigc.
