He held a stall at Rathkeale's gala, decorated it with Nepalese prayer flags and sold plants and homemade lavender oil and held a raffle for a table built by his father.
He has also spent time busking in Wellington and working for the Department of Conservation.
Keith will join about 20 other students to trek up the Everest Valley. The students will stop in Sherpa villages along the way and participate in a reforestation project.
"It will be a life-changing experience, we actually get to see Mount Everest, there's a few spots along the track where we can see it through the mountains."
They will also visit the Sir Edmund Hillary-built school and hospital.
"I might be teaching the Nepalese children a bit of English and New Zealand culture which will be pretty amazing," he said.
Although he does not think fitness will be a problem, Keith is concerned about not having enough oxygen.
"They've told me you need walking sticks there just to walk down the road," he said.
On his way back Keith will spend two weeks volunteering at the Singapore Zoo.
"Working with the animals will be great and learning about conservation techniques to help protect and conserve the endangered species," he said.
Next year, Keith wants to study Environmental Science at Canterbury or Otago University.
He is also thinking about taking a gap year to work in a Buddhist monastery and teach English in Nepal or Northern India.
Keith's stepfather, Garry Wilson, said the family were extremely proud of Keith and the work he has done to reach his dream.
"We see this experience as a fantastic opportunity for him to grow from a boy to a well-grounded young man before he enters the next phase of his life.
"He will have his boundaries pushed whilst trekking up the Everest Valley, he will be exposed to incredibly different cultures and living conditions and have the wonderful chance to work in a world-renowned zoo," Mr Wilson said.
