He believed the building had been there since the 1960s and said it was a "pretty solid building".
They are hoping to have Mr Gillespie move in the next few weeks, with the kitchen, bathroom and floors left to do.
Mr Gillespie said the show of support had been "amazing".
"From my perspective as a new principal who has only just started out this year, to see that sort of commitment from the community for people that they don't really know is pretty special.
"There is no place I'd rather be than out there working with these people just purely for that fact that the people there are amazing and that the community is something else."
He noted that a builder from Auckland up for a holiday with his family spent two days helping to fix the gib and help out with structural work - something which "blew [him] away".
Mr Gillespie believed he and his wife and two children were "pretty lucky" and said it "is going to be a fantastic resource" in the coming years.