I have bad news for you. No matter what you do here it is probably not sustainable. Competing commercially with people who have so much more resources and ability to build is not sustainable. If it's open source you need adoption, and shouldn't care if people want to steal and remix your work as that will drive more adoption.

But from a fellow engineer's perspective we don't need another commercial solution in this space. Every major tech vendor is working on harnesses, and we will get ones that will run circles around yours for free. The open source ones that get popular will have mit/freebsd/etc permissive licenses. (or no one will adopt them) But coming at it from the angle you are indicates you haven't reasoned well about this. Please don't hurt yourself and those around you by starting a startup on this idea.