She said the investors had done extensive pre-trip research and knew exactly what they were looking for.
"They were all looking for rental return on a property," she said. "So they were looking at things like rents, rates, even fireplace emissions."
She said the group had turned to New Zealand as it was difficult to get rental returns in Australian cities. Another advantage was the lack of capital gains tax and stamp duty and the favourable exchange rate.
Mr Guilford said the visitors viewed homes ranging from $99,000 to a block of flats worth more than $500,000.
"A lot of properties were rejected," he said. "They knew the qualities of a good rental - three bedrooms, heating, a garage, etc."
Ms Baker said as most of the properties bought were already rented, the buy up wouldn't have much effect on local tenants.
"But it had an effect on owners - all of a sudden there's this interest."
Local investors and first-home buyers don't need to worry, according to Ms Baker.
"There are a huge amount of properties - we are not fighting for stock."
She said the buyers had made fewer offers in Wanganui than Rotorua, despite there being an abundance of cheap properties.
"Rotorua has the infrastructure to support our rentals," she said.
"It's all about being positive and not under-selling our city."
Harcourts Rotorua manager Hielke Oppers said his agency had also received at least four offers from the group. He said the transtasman visit was a sign of the market picking up and of an increased confidence in property investment.
"The properties they were looking at were all based on cashflow. People have learnt, if you want to succeed in investment you need high returns."