Your industry is a highly competitve one with very little differentiation other than branding built on personal image and relationships.
Before you go further, I would ask myself honestly "what is my special sauce"? Then I would take a look at each of your main competitors and ask "why would a customer buy from them instead of me"?
If you honestly answer these question, you will get a view of how you will compete in the market.
Innovative business ideas for the serious entrepreneur