"I can say now, it was the best decision," Mr Banwait said.
Staying with a local doctor who trained in medicine with his cousin, Mr Banwait has helped residents in central Kathmandu who were most impacted by the quake. He said they were still experiencing aftershocks.
"We helped 165 people with temporary shelter so far whose houses have been completely knocked down or partially damaged. They could come down any moment with the after-effects, there's at least two or three each day.
"Through my local friend, I have been able to contact businesses and bought temporary shelters, we hired a truck and loaded it and were able to hand them out through the village areas," Mr Banwait said. "Their living conditions are pretty dire here - they've strung up tarpaulins or bed sheets between two wooden poles and sleep under that," he said.
"The Government has given out to families 12.5kg of rice, one bottle of oil and some salt to last them for 14 days.
"People are so thankful that people from other cultures have come to help them, especially in the villages. Already between 700,000 and 1 million people have fled Kathmandu and returned to their own villages after the quake."
Mr Banwait will leave Kathmandu and travel to the Gorkah and Pokhara areas where 28 people in one village were killed. He will return home to Rotorua next Sunday.