Hello,
Yes I have similar concerns about my ideas. Guess what ... No one said you had to reinvent the wheel to be different. It will be different because no two people are alike and your unique personality will bring the difference to the sale not the item.

As for budgeting and organizing maybe get your feet wet by volunteering to teach at places like the YMCA/YWCA,or local youth centers, and or your local welfare department. That way you can get a taste of the reception and questions you might get without commiting your life savings and you can decide if that avenue will take you where you want to go.
Holly