The operation would be a game-changer for Austin but his family needed at least $100,000 to get him there - and now they have done it.
Austin's dad, Brett Manning, said it was an incredible evening.
"The Chiefs were fantastic. Right from the management to the players. They were all a great bunch of guys who had so much love and aspirations for Austin."
Mr Manning said the fundraising dinner flowed with lots of joking and laughter.
"I think that reflected on the generosity of the people at the auction."
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An exact figure had not be tallied yet but he estimated $65,000 had been raised in Wednesday night's auctions.
"It's mind-blowing how people opened their wallets up and bought some pretty good prizes. I didn't see one person leave that place that didn't enjoy themselves."
Prizes included custom-made surfboards signed by the Chiefs squad, a fishing trip and signed All Blacks and Chiefs jerseys which were all auctioned off by Brian King of Harcourts.
"$150 worth of wine went for $3000. At the end of the auction the auctioneer auctioned off nothing for $4000. He sold nothing for $4000, so it just shows you the generosity of the people who were out there.
"We're up to about $125,000 for the trip. It's a huge weight off our shoulders. The generosity in our community has just blown us away ... and the Chiefs sealed the deal with such a fantastic evening."