Dear Sir,
We are a team with both hardware and software engineer. We see you are in need of PCB designer and manufacturer. We have extensive experience in this field. We have designed many product like: set-top-box, 2g-handset, fpga board, pcie switching board, tracking, ... If you want, we can send examples of our work to you for verify our skills. Follow your questions:
1. PCB Design cost: we estimated 1700$ per 1 month
2. Prototype cost (including parts and welding): we will inform to you after having BOM, we only charge assembly fee for making prototype
3. Manufacturing (Price per working piece): very difficult to estimated in this time
If you have any question, please feel free to ask our.
Thanks and looking forward to hearing from you.