If the Chavadi was so awful, were there any benefits for Amir Shakkar in staying there?

Yes, despite the dreadful physical conditions, staying in the Chavadi offered Amir Shakkar a unique spiritual advantage. Chapter 22 explains that the 'company of Sai was the Great Prasad.' Because of the Chavadi's location, Amir received an effortless and frequent vision of Baba. He could see Baba every morning and evening during His daily routines without having to move. Furthermore, on alternate nights when Baba slept in the Chavadi, they were separated only by a plank door, and after other devotees left, they would talk with calm minds. This intimate companionship with Sai was a rare benefit not easily available to others.