Your question inspired me :>
I run my own online retail store in Singapore www.buyonlinesingapore.com, its one of the best business model because I have positive cash flow, with very little capital required because I'm the middleman for my suppliers/sellers and my online retail customers.
My 2 cents is to find the intersection of between your passion and the a business model that suits your lifestyle while adding massive value to your customers.
Once you find the business that's right for you, take the first step and just go for it. Have a long plan but just do the first thing that will move your business along.