How do you know if you are ready to start your business? Marcus Lemonis of CNBC’s The Profit suggests that you ask your friends, family and acquaintances for brutal honesty to the question: Am I capable of starting this business? The further you get from your immediate family, says Lemonis, the more honest the opinion is likely to be. If the answer to the capability question is “no” then you need to rethink your original idea. If the answer is, “Yes, if…” then you should pay attention to the advice that follows. Of course, you should be an expert on the business and the competition you face before you start.