"I've been blown away with how many people have donated, we've had [Renovators Painters & Decorators] in Ngongotaha, who donated heaps of paint, and the people on the corner are renovating their house and have brought in curtains.
"All the neighbours have donated."
Mrs Sloane said Hamilton was great with the special needs children she worked with and often looked after them in her home. "When he comes round he's such a caring, loving guy to them, always says, 'gidday'.
"He's supportive of what I do, so I wanted to support him too," she said.
Hamilton is aiming to compete in the UCI Elite Mountain Bike & Trials World Championships in Vallnord, Andorra next year. He said his chances of competing increased the more races he took part in.
"It's pretty awesome the support. I couldn't have got where I am without everybody helping me," he said.
Donations for the garage sale can be dropped off to 10 Hinau St, Pukehangi or by contacting Mrs Sloane on 027 414 6328.