Almost 100 people have booked to attend the afternoon, which will feature spot prizes, beers and an auction.
The family has raised most of the $200,000 that was initially sought, although currency changes have brought the total required closer to $220,000, Mr Regnault said.
The response from the community had been awesome, Mr Regnault said.
"We knew we lived in an awesome area and we knew that our families have been good folks in the community, so we were hopeful that we would have good support and it has been delivered in spades."
From December, the family plans to take a break to focus on preparing the children for the 10-12 weeks Mrs Regnault will be spending in Singapore for treatment, Mr Regnault said.
"We always said that come the end of November we had to put a line through the events and spend December and January preparing the kids."
"We just need to get on and do it."
Mr Regnault said his wife was doing well, if a little tired as the end of the year approached.
"She's going well - she's getting nervous but that's a good thing."