What the other folks said: the odds are usually against you, but perseverance is important in any business venture.

An absolutely great resource for your research and free advice is SCORE - Service Core of Retired Executives. They give workshops, and provide one-on-one counseling to all sizes of business, from a start up to corporate size.

When we were starting up, we used their counseling services extensively.

If you do decide to market your product, keep us in mind for distribution, since we are always looking for new cool gizmos.