Advice needed, commercializing an Arduino Due project
There's two routes you can take.

First route:


Get the Due schematics.
Remove the parts you don't need.
Add to it the new components for your product.
Lay out the PCB design.
Get the PCB manufactured.
Solder all the components on.
Test it and go back to step 2/3 as required.


Second route:


Hire a contractor that knows the SAM3X and can do it all for you.