hey thanks. I sure will add additional details along the road and probably write something else about manufacturing. Since it appears that it can be a very complicated (and costly) adventure, I contacted a local start-up incubator hoping to benefit form their expertise.
I learned a lot about the basics with "Getting started in Electronics" by Forrest M. Mims III, it's very (very) accessible and I find the drawings very amusing.
Or else you have the Bible of the trade, or "The Art of Electronics" by Paul Horowitz and Winfield Hill that just came out for a third edition. It's an incredibly comprehensive guide but you'd better have some free time ahead if you want to read through it all :)