I'll add another power of ten to yours. Just like you gotta be a full-stack developer to be lean and mean in your early-stage web startup, you gotta do/learn as much of the hardware stack yourself to save money and keep hard-won knowledge in-house. Given how capital-intensive hardware is, you should be even more stingy.

Not that everything must be done yourself any more than you should reinvent AWS. But here's an extreme case of outsourcing: https://medium.com/@stevekreyos/the-rise-and-fall-of-kreyos-...