Who was the person instructed to live in the miserable Chavadi, and what made the place so unpleasant?

Amir Shakkar was the devotee instructed by Sai Baba to live in the Chavadi to cure his rheumatism. Chapter 22 vividly describes the place as old, dilapidated, and a 'pilgrimage of a lifetime' in terms of hardship. It was home to lizards and poisonous scorpions, and lepers also stayed there. The text mentions garbage, seventeen knee-deep holes, dampness from the ground, rain from above, and a general chaos of wind and cold, which made Amir's mind turmoil and his stay there extremely difficult.