Can you explain how Sai Baba helped Narayan Motiram Jaani switch from being a servant to owning his own business?

Certainly. According to Chapter 33, Narayan Motiram Jaani was a faithful devotee of Baba who worked as a servant for Ramchandra Vaman Modak. When Narayanrao went for Baba's Darshan, Baba indicated that his time in service was over, advising him, "Enough of this servitude now; you should start an independent business instead." Following this guidance, Narayanrao's job ended, and he embraced independence. He established a place called "Anandashram" and, through his own efforts, its reputation grew, bringing him peace of mind. This direct experience of Baba's words coming true transformed his faith into unshakable devotion.