"You have your normal income and operating expenditure and that's fine, but then every so often you've got to spend $15 million on a tug, or you've got to spend $70 million on a new wharf, or you've got to spend $150/$200 million on a wharf and breakwaters."
"For regional ports in particular, having that narrow base of shareholders can be a disincentive to actually raising that money."
Napier Port is going through the consent process to build a new wharf because it is now turning away both cargo and cruise ships.
The new wharf has an estimated cost of $142 million.
Weaver said Hawke's Bay had an excellent example of how a mixed ownership model could work, up the road in Tauranga.
"It is 55 per cent owned by the council and 45 per cent from listing on the sharemarket.
"It's been a wonderful investment for the council to sell its shares."
Formal consultation on the Napier Port ownership opened yesterday , with consultation documents being mailed to 70,000 households across Hawke's Bay .
HBRC's chairman Rex Graham said the council had been working on the proposal for the better part of two years, and now it was time for the public to have their say.
"We have an open mind. We've been very transparent about this process and the options and we now need to hear from the people of Hawke's Bay."
The council has come up with four options to consult the public on.
Its preferred option is Option B, which would see up to 49 per cent of the port sold on the New Zealand Stock Exchange.
The options
Option A: Retain full ownership and control. HBRC would maintain 100 per cent ownership of the port, funding capital works through a 45.2 per cent increase in rates next year.
Option B: Sell up to 49 per cent public share offer. HBRC would float a minority stake of up to 49 per cent on the New Zealand Stock Exchange. This is council's preferred option.
Option C: Sell up to 49 per cent to an investment partner. HBRC would sell up to 49 per cent of shares to either a single investor or a group of entities.
Option D: Lease port operations to a private investor. HBRC would lease port operations to a private investor for up to 50 years while maintaining ownership of land and assets.