I have my buddy Nic from South Africa on this week.  He is a high level Brazilian Jiu-Jitsu black belt under the legendary Roger Gracie and the founder of the Jiu-Jitsu Brotherhood.  He sells merchandise on his website but even more lucratively he has a Medical Exam test company he started with one of his Jiu-Jitsu students, similar to Pat Flynn's LEED Exam course that really funds his world wide travel along with teaching Jiu-Jitsu seminars.