But your idea may be so new that you may also need to talk to potential customers, host some focus groups, talk to an ad agency, or maybe even make a prototype and float it past some people. Be prepared to spend the time. Remember, it's not about the Plan but the Planning.
One crucial function they perform is the formulation of business plans. This plan is based on the information provided by the client coupled with the vast wealth of knowledge and research a business plan consultant has.
Website design templates also offer you a wide array of features so that you get only quality results. It is a much cheaper way to promote your business. It cuts down your major expenses. Even a person who has least knowledge of the technical things can easily customize these templates.
Besides, your friends may be 100% behind you in your new venture, but, in case you are hoping to involve others who have actual money to invest, you may need to be able to make a convincing case. Wouldn't it be nice to have anticipated possible questions and be ready with plausible answers? If you are risking your own money, that is perhaps even a stronger reason to do some indispensable planning.