Can you share the story of the devotee Appa? How did he serve Maharaj with his wealth like Kashiram did?

The provided text in Chapter 0 introduces Appa as one of the three early individuals who became a total devotee of Maharaj, alongside Kashiram and Mhalasapati. The chapter notes that Appa passed away some years after Kashiram and was fortunate to die on an Ekadashi day. However, unlike the detailed account of Kashiram's service, financial trials, and encounters, the text does not provide any specific stories about how Appa served Maharaj, what his profession was, or if he served with his wealth in a manner similar to Kashiram.