From BBB prototype to final product

Hi all,
I had a prototype on BeagleBone Black now I want to create an Embedded Board for reach the same goal, but with low price and many peripherals integrated. I know that the AM3352 is pinout compatible, but I don’t figure out how to create a functional board. I want that when I power my Board the operating system on the SD starts. How can i program my board to do this?

Hope someone have something to say because I’ve googlin for the last three hours.

Please look at my earlier answer.