Just build a working demo and put it to Kickstarter. You need to prepare final product design and spec. Just define your goal and make people invest on you.
Building a prototype would not only require a significant investment upfront, because as I've noted already, some of the tech is still only used in labs and R&D centers for a whole other purpose, but it's yet to be widely available off-the-shelf product. And I by myself couldn't afford even buying the raw materials, not to mention about working on it for a few months, which I'm unable to do because at the end of the day somebody needs to bring food to our table.
On top of that I don't have the technical knowledge to actually build a working prototype, mind you that even though the final product might be simple and neat, making the components work with each other the way they suppose to, isn't.
How would I prepare a final product design and spec without having any knowledge in doing such thing? I don't have a CS degree, I'm not versed in the barebones of technology, but I do understand how to connect various components together to create something new.