"Everybody has a plan, until they get punched in the face." Mike Tyson
In his TED talk, Bill Gross, founder of Idea Lab, explains that what matters most is the timing. Start at the right time and it'll be a success.
Then comes the team and execution. Then the idea, which most people think is crucial... Counter intuitively.
Last and not least the business plan and the funding. So timing comes first, yet you'll never really know it if you don't try it. So why not try it now?