So how exactly can comunity help with OH?

It seems Jolla hopes for the community to come up with HW? How realistic is that? There is some profit to be made that is for sure, so hopefully some manufacturer bites, but without this happening.
What is the best way? There is already thread on design discussion, one for actual implementation with chip and functionality testing. Are 3d printers good enough to produce solid quality production line? Or will this just be tech demo for manufacturers to help them out?
Can the community pull this off? (Neo900 project looks like it is possible on board side) Kickstarter?