Harris, who remains remarkably upbeat, has had major surgery and is now on this third round of chemotherapy. However, once the chemo loses its effect, about eight months from now, his time is likely to be measured in weeks.
Cancer specialists say the one drug which could extend Harris' life is not funded for his type of cancer, leaving his family to raise $100,000 in a matter of months.
Family spokeswoman Ruby Grace said they had no illusions about the immunotherapy drug Keytruda being some kind of miracle cure, but it did represent hope and Harris' best chance of more time. In particular he wanted to pass on as much as he could to his sons Waaka, 9, and Heremia, 12.
A former IT technician, Harris trained as a primary school teacher so he could "give back to children". In October last year, weeks away from finishing his degree, he passed out while teaching. He was found to be severely anaemic. Tests showed the cause was an aggressive colon cancer which had spread to his stomach lining.
A "mad rush" to finish his last assignments followed, then an eight-hour operation with a 2kg tumour removed.
Harris, once a solidly built man, lost 40kg and couldn't walk at the time of his graduation ceremony. He was determined to come home to Ōtaua to be with his family.
Grace, Waaka and Heremia's mum, said oncologists told the family immunotherapy was suitable for Harris' type of cancer and had been shown to stop or shrink tumours.
However, the unfunded drug costs $87,000, plus hefty administration fees and an extra $1300 every three weeks for two years.
"The kicker is that you can be eligible for state funding if you have lung cancer or melanoma, so it's not like it's some kind of magical, imaginary drug."
Harris' latest CT scan had shown new tumours in his stomach lining and liver, "so the sooner we can start immunotherapy the better it is for Whiti. We're super positive and we have lots of backers, but $100,000 is a lot of money and the short time frame puts a lot of pressure on us."
The family has set up Givealittle and Facebook pages called 'From graduation to hospital gown'. This week they had 300-plus donations totalling more than $18,000.
Many of the donations are from whānau — Harris' young nieces in Australia donate their pocket money every week — but others are from strangers, many of whom leave heart-warming messages.
The family is also organising fundraising events such as a virtual triathlon and an Easter bunny show at Kaikohe's Pioneer Village. A tattooist cousin is offering $100 tattoos for a week with all proceeds to the cause.
Harris said he was tired most days due to the chemo but still managed to work in the garden, and even mow the lawns despite protestations from family. He was also planning to put his degree into practice by home-schooling his sons.
"That's my passion, to show them some life skills before I pass on."
Despite everything he described the months since his diagnosis as an "awesome journey".
"You find there's a lot of people who are sympathetic and empathetic. It's nice to hear those things before you die, before the tangi. We've made friends and connections with a really diverse range of people, people we wouldn't usually mix with. That is the silver lining we like to grasp onto as we fall down the rabbit hole."
■ Go to www.facebook.com/grad2gown or givealittle.co.nz/cause/from-graduation-to-hospital-gown to help.
