I think it's your determination! Because it's not so easy to get started.You might meet lots of problems when you begin your new business,especially when you want to save money! Take a look at MJsneaker.com! It was started two weeks ago!
Personally I think is a matter of choosing a product that people want, then choosing a domain name that will go well with the product. Developing the website should come then, followed by promoting it. All this ofcourse better be backed up by determination.