Earning money through e-commerce isn't as easy as some might make it to be. Its in fact quit difficult, and only a very small percentage succeed. Whether its through Shopify or BigCommerce, you'll need a lot of start-up capital to get up and running. We've had our own e-commerce store for three months now, and its a lot of work. We're at it full time.
Note aside: if anyone has suggestions on how to improve SEO, site ranking, and how to get organic traffic, that would be nice.
Edited by cpradio: Remove unnecessary link