The funds have been donated to a Givealittle page set up by Ben and wife Jess's friends in a bid to help them get alternative treatment that is not currently funded.
The treatment, which would involve a course of immunotherapy drug Avastin, would cost them around $10,000 a month.
Jess Suisala said: "The treatment would be expensive and it can have quite bad side effects.
"But it could also improve his quality of life. So we're looking at giving it a go.''
Before being diagnosed, the young father and former Auckland Grammar student was fit and healthy and enjoyed looking after himself.
He played sport and had a passion for rugby; playing for Grammar Carlton Rugby and the New South Wales Country Eagles, in Sydney, two years ago.
Those who made donations sent messages of encouragement to Suisala and his family.
A guest donor who gifted $500 wrote: "Dear Ben, I was very saddened to read of your situation recently. It's impossible to fathom why such a horrible thing could happen to such good people.
"I remember you at AGS and GC rugby as such a humble guy despite your obvious tremendous talent on the field and I have nothing but respect for you.
"I hope that this helps give you and yours the best possible outcome. My thoughts and prayers got out to you all.''
