Blind Fury 2
This was a really fun, if unrealistic, movie starring Rutger Hauer as a Vietnam Vet who was blinded in battle and studied swordsmanship with the natives who nursed him back to health. He comes back home and ends up having to defend his old army buddy's kid from a bunch of gangsters. It's pretty much a modernization/Americanization of the Japanese Zatoichi movies.
I figure in the sequel, Frank Parker (Hauer) opens up his own fencing school. He trains his students in one on one tutorials, and charges a fair bit for his survices. Then one of his students gets into a heap of trouble, Frank has to use his martial arts skills to save the day.