Whanganui District Council has spent almost $30,000 assessing Midwest Ferries' proposed ferry service to Motueka.
And it could fund more "providing the information is also of benefit to the future management of the port".
Following a feasibility study which Midwest Ferries presented to councillors earlier this year a council-commissioned peer review found significant shortcomings in the proposal.
The council has been working with Midwest since to offer feedback and has so far funded three reports about the requirements for a potential large ship operation at the Whanganui Port.
The $29,809 spent includes consultants fees and $5759 in council staff costs (an estimated 160 hours).