"We've had a few hui, now it's time to find out whether groups are interested, and if they are, timeframes around that."
But the conservative nature of many iwi organisations meant that taking on debt was often a risk many were unwilling to take because many of the assets came from Treaty settlements, Mr Gardiner said.
Taupo-based Tuaropaki Trust, whose half-billion-dollar assets include sizeable geothermal energy, is one of the few Maori groups which is using debt and not scared of it. It has a 70:30 asset-to-debt ratio.
Chairman Tumanako Wereta said that level didn't matter because the debt was backed by a solid revenue stream.
Following Maori Affairs Minister Pita Sharples' economic hui earlier in the year, the meeting was the latest gathering of iwi who are pushing the Government to come up with infrastructure projects that they can invest in.
Finance Minister Bill English, who also attended, said he didn't have a problem with doing business with iwi.
However, because these types of deals had never been done before, the Government would want to start small to "build confidence" with $100 million investments, in "social infrastructure" such as schools or police stations.