Nonstop Trouble with the Family(1985)

Overview:

A series of murders eliminates the poverty-stricken heirs to a 10 million-dollar fortune while Didi Dodel, the unsuspecting main heir, blithely escapes the attempts on his life. After a wealthy miser dies and leaves his fortune to Didi and five others, the five each hit upon the idea of eliminating Didi from the list (Didi does not know he has been named), but they do not realize how fate can step in and alter the best and worst of intentions.