You have twice my professional age, and I have come to the same realisation.

I want to earn enough money from my business ideas to spend the rest of my time on hacking on niche languages, distributed/anonymous networks, etc. and as I grow older, to use computer and programming just to maintain a modern off-the-grid life (so working on my smart grid, automating my cabin-in-the-woods life)

Computers and the Internet have gone from being a lifestyle, to just a tool.