Personally, I find boring to be quite exciting - but perhaps not if the only thing you're looking at is the technical solution. Building a small business involves figuring out how to solve the mundane but important thing, but then you get to figure out how to sell it, how much to charge, how to do customer outreach, do support, turn the business into a repeatable process, etc. Building a business out of it is quite challenging and fun and the technical solution is frankly a small part of it.
Many solo-preneur types with technical backgrounds are way over-indexed on the technical aspect and want to treat it like their last technical job, but without a boss, which leads to a lot of disappointment and frustration.
You make it sound easy! How do I do that outside of not just SF, but the US?