Is it true that Janakidas Baba was the one who demanded Dakshina from Kashiram until he went broke as a test of faith?

This is a misunderstanding of the roles of the individuals mentioned in the text. According to Chapter 0, it was Maharaj (Sai Baba) who continuously demanded Dakshina from Kashiram to the point of financial hardship. This was done as a 'Leela' to remove Kashiram's pride, which was seen as a spiritual obstacle. The text mentions Janakidas Baba in a completely different context; he was the saint who had advised Kashiram to feed sugar to ants. Kashiram followed this separate advice so diligently that he always carried powdered sugar with him.