Explain the challenges Cholkar faced in fulfilling his vow to Sai Baba and how he handled the delay.

Cholkar, coming from a poor household, faced significant financial hardship that delayed his pilgrimage to Shirdi to fulfill his vow. Chapter 15 poetically describes this struggle, noting that for a worldly man, crossing the "threshold-ghat" of home expenses is incredibly difficult. Despite his wish being granted, he couldn't go empty-handed and had to push the journey from one day to the next. During this waiting period, Cholkar demonstrated his unwavering devotion by taking a personal vow of renunciation: he completely avoided sugar, treating it as an inedible substance and even drinking his tea unsweetened until he could finally make the trip and honor his original promise to Baba.