The Herald revealed before the show started in August that they were the most experienced pair in the competition, having already renovated three homes around Auckland.
Mrs Pearson said yesterday: "Having the properties that we do, it's massive financial pressure and to be able to take a dent out of it and not have that pressure, our day-to-day life will be incredible.
"We only pay our interest, we've never actually paid our mortgage because we just can't afford it. People may not understand but for us it's a really exciting thing to be able to pay back some of our mortgage.
"We have a big mortgage for a young couple so it definitely has meant there's not much more we can do financially. We put all our eggs in one basket in terms of property."
But Mrs Pearson said she would work on her husband to use some of the money for a shopping trip.
The couple also made a pact with the other contestants that whoever won would pay for the others to fly to the winners' home town.
So the Pearsons plan to fly Nelson couple Loz and Tom Heaphy and Rangitikei brothers Pete and Andy Walker to Auckland and perhaps take them to Matakana for a holiday.
Auckland couple Alisa Keall-Grant and Koan Vette live in the same suburb as the Pearsons.
The couple returned to work a few weeks ago - Mr Pearson as a project manager for the Greenstone Group, a property consultancy firm, and his wife as a youth worker for LIFE church.