Most of the big sites were built by a couple of coders in a few weekends. Google was online a few months after the page rank paper was published. Twitter took

Most of the big sites were built by a couple of coders in a few weekends. Google was online a few months after the page rank paper was published. Twitter took a small team a couple of months for the initial release. Zuckerberg famously wrote facebook in a couple of weekends. Most of the explosive growth of those companies was built on essentially weekend projects by a handful of coders, or even one person. You absolutely can write a billion dollar app in a weekend. If you have the right idea at the right time, with the right connections.