Assuming that you’re a hardware hacker with full passionate about to making the new product and you dont want to build your own factory by tweaking around the soldering workbench or PnP psychopunk machine. It’s likely you’re end up somewhere( Asia: Shenzhen/Hongkong/Vietnam/etc, EU: Estonia/Germany/Sweden/etc, Americas: New Jersey/Mexico City/etc) to fit your need due to the trend of regional supply chain. You may encounter some problems no matter how the supply chain was formed.