Siting share my experience of it, calculate the cost of a year. Domain
1. 10 dollars.
2. hosted web space of about $ 7 / month, no flow and space restrictions, 7 * 12 = 84 dollars.
3. site security detection, about $ 25 / year.
4. use open source software is free.
5. Payment Gateway: $ 400 / year.
6. SEO optimization: about $ 100 / month, $ 1,000 a year considered good.
7. SEM keyword promotion: pre spent about $ 1,000, although personal feeling can bring sales, but the start-up phase to be used with caution.
8. stock, probably thousands of dollars look.

not inventory and labor, in fact, this year down physical investment is between 1500-2600 dollars. If the flow of rent their own independent host is add hundreds of dollars to do. SEM also may or may not.

say what I saw upstairs SEO optimization to two individuals 10K a month, but also to do large-scale long-tail words, the country is so exaggerated it?