"We will equip Auckland to be a city of the 21st century," he said.
Peters wants legislation to move all container operations to Northport at Marsden Pt near Whangarei by the end of 2027.
His party's plan would create a "special economic area" near Northport, which would be duty-free, GST-free and tax-free. Peters said another such area could later be established in Southland.
It would require the immediate upgrade of the Auckland-to-Northland rail line, including a new rail spur to Northport. KiwiRail has put the cost of doing so in the billions of dollars - which doesn't include any upgrade of Northport.
He said another proposal, to move the port to Thames, was too expensive. Economics experts backed the Northland proposal, Peters said. However, when asked which experts, he couldn't give any names.
During a question and answer session, where Peters answered questions on everything from capital gains tax to why Queen St only had one public toilet, he also said he would put the national anthem to a referendum.
No one ever sang it in pubs, he said.
Turning to Saturday night's election, Peters said he would be using all the hours he had left up north.
"It's been a long grinding campaign around New Zealand... we are relying on coming home to Northland strongly and changing the regional outcome of New Zealand politics," he said.
While he didn't take anything for granted, he said people should know he was the best candidate for the north.
Asked about internal polling, Peters said: "Let's just say I'm getting on with the job and I'm confident about [Saturday] night."
He was also asked about being the "kingmaker", which he criticised as a pointless question.
"I despise that phrase frankly. I nor my colleagues are in the job to be king or queen maker," he said.
"I wish media would elevate their sights a bit more ... to things that do matter in this country - the economic change that's required and the social underpinning of so many concerns by way of expenditure by treasury," he said.
