Houkamau received spinal injuries in a car accident and is paralysed on his left side. He has only partial movement in one hand and can't walk far but he digs deep on the water, working with five other crew members to power the waka ama forward.
"I feel the benefits from the sport, certainly from the training and comradeship," he said. "You don't feel like you're the odd one out - everyone has something going on."
The team are in good hands with one of the country's top women paddlers, Roni Nuku, as their coach. However, they face a challenge in fundraising for the world champs.
"It's not just us going," Houkamau says of the team, "everyone has to take a support person. I'm taking my wife, Angela. Everyone needs someone but we have nowhere near the $30,000 or so needed for the trip.
"We are cooking hangi, selling raffle tickets and have a Givealittle page on NZ Para/Adaptive Waka Ama Team Facebook, but over and above that we need sponsorship.
"Hopefully we can get our faces out there and someone might latch onto us and get us to where we want to go."
The adaptive team showed its form at the National Waka Ama Sprint Championship held on Lake Karapiro in January.
"That worked out well: three teams took part in our section and we came back with several bronze medals. Three teams took part in our section.
"Hopefully, in the not-too-distant future, all eight lanes will be full of adaptive paddlers."
After the worlds, the team has its sights set on Rio de Janeiro next year.
"If we can get through this one, I don't see why we can't get to that one as well."