I've been working towards a self-funded search, and although I've mostly been focusing on more "traditional" businesses (i.e., "boring" companies, like HVAC services, distribution, manufacturing, etc.), I've been encouraged to consider companies which compliment my background (I've been a software engineer for nearly a decade with a fair bit of experience in SaaS platforms). I've been looking around, and I'm finding there's quite a few differences in everything from how these businesses are found, how they're evaluated, how I financing works, etc.

So, in general, what major differences between these approaches should I be aware of? Are there any specific resources I should look into? Is there a good way to leverage my background in my search?