When building your own wheels -- or anything -- ensuring you have quality parts is paramount. I've built many wheels now and usually use DT Swiss spokes, but for my custom trike project, the spoke vendor wasn't known. And it had disastrous results.
Last year my recumbent trike (link in progress) developed a case of Spokus Brokenus on one of its front wheels. It's a "tadpole" trike, which means there is one wheel in back for propulsion, and the two in front steer. It was odd that just the one front wheel had this issue, but it became clear why.