Sadly, the last of these is where my interest wanes. I don't have dreams of being astonishingly rich or successful (why, I'd be happy with a measly $1M business - if it wasn't too much effort to run). I don't want to take on lots of funding and staff and the pressure that entails. I'm more interested in a "lifestyle business" - perhaps one that I can run part-time after an initial period, that doesn't have lots of deadlines, but still nets me a decent amount of money each year (let's say £50k a year, for a concrete figure). This kind of business still needs someone to give domain input/product direction, do sales, think of new features, etc.
It feels like there should be some supply of "business" co-founders for these kinds of businesses. I expect they would probably work part-time/be an adviser (and therefore take a lower amount of the company). For example: management consultants/MBAs who don't want to take the plunge and quit their regular jobs, but would be happy to do a few days a month to get a feel for startups. Or small business owners who have a specific problem and want to see a solution built, but have no interest in making that their main income.
So far, I've tried asking my friends in various fields (some polite interest, but mostly lacking what you might call 'product vision'), and some small business forums (mostly contained lunatics with questions like "I've just taken out a loan to open two restaurants; any advice on how to put together a menu?").
Where could I find suitable people? Any ideas gratefully received.