The pair are realistic about not being able to achieve the total, but hope Northland will get behind them at a gala day on November 30.
"Now it's a case of getting there," Andrea said before pausing to explain to Grace that they'll give it their best shot but may not make it.
"The nice man who has bought [the old Mitsubishi car-yard site] is donating the land to us for the day, Frings [Brauhaus] is helping out and has organised a band for the day."
Andrea says the day will run from 10am to 4pm and will include a monster garage sale, a fundraising auction, sausage sizzle, a barbecue, cake stall, cheerleading and hip-hop dance displays.
She said she was open to donations for the day's auction or cake stall, so to arrange logistics call her on 0274335051.
Grace has a Facebook page and if Northlanders would like to follow her on her quest just search for "Grace Hegh".
To donate money to Grace, her account number is 06-0977-0800220-00.
For Grace at this exciting time, her biggest concern is how to balance time hanging out with all her friends.
"Hanging out with all of them [is hard]," Grace said.
"Because they want to hang out with you but sometimes you just want to hang out with your friends. But at least you make more friends, it's good to make more friends."