Gary,

Tim Ferris's model for a 4 hour work week is built around the premise of a supplement business:

http://www.fourhourworkweek.com/blog/
http://www.amazon.com/4-Hour-Workwee...94169&sr= 8-1

This is the best start I can point you towards! Well worth reading and having this business model bouncing around in your noggin whether you get into supplements or not.

-Erik