As the owner of a clothing company, I am trying to move forward with the ideas I've come up with for the last 4 years. I have an angel investor but I want to prove to him there's a market for my product. Currently I'm in the process of building a website and I have 120 units stored away in my room. Should I be researching secondary data while trying to sell the product when I'm only a one-man business? Any advice?