The key to ensuring the success of your design is to gather knowledge and apply it to your design.
Self-assembled
A small quantity of PCB better to be assembled by hands under your own control. These help with quality assurance, verifying that there is no problem with the test product, finding bugs, and updating the design.
Self-coding
Hiring programmers will keep being expensive for a while. Programming is not an easy task, and it requires long-term responsibility.
