The business plan described here is outlined the book the "4 hour work week" by Tim Ferris. I'm adding my personal experience in succesfully implementing it.
Creating a muse
A muse is an automated business that provides a passive source of income. Will it makes us rich? Probably not. Will it gives as a steady monthly cashflow with minimum management time that allows us to do other stuff? You bet.
I'm gonna describe one type of muse; the one that ships products.
The most important thing is to start with the end in mind; we have the model, then the prize range, and only then we find the product.