The parent, who spoke to the Northland Age on the condition of anonymity, said the school was effectively broke at the end of last year.
"It was running on deficit," he said, adding that he knew of even modest cheques that had been dishonoured.
And worse, money that had been raised in the community specifically for other purposes, such as a school camp and sports gear, had been used to help pay the commissioner's bill.
"This wasn't taxpayer funding. This was money that came from the community, and it may never be recouped," he said.
"Some of it was deposited in a school account by children. It should have been tagged but it wasn't, and now it's gone, to the detriment of the children, their families and the school's financial reputation."
He was still struggling to understand why a commissioner had been appointed in the first place.
"The trustees have never been told that they did anything wrong," he said.
"There has been no public condemnation of them, and they were never told why they were suspended, then fired. They were just removed.
"There is a mood of despondency at the school that should never have happened. A lot of the stress that has been generated was totally unnecessary." He also argued that the commissioner had done no more than would be expected of a competent chairman of trustees, who would generally cost a school a few hundred dollars a year, as opposed to tens of thousands.