Can you tell me about the man who visited Shirdi with Kaka Mahajani, specifically his beliefs and the conditions he set for the trip?

Certainly. According to the account in Chapter 35, a friend of Kaka Mahajani was a great devotee of the formless and was averse to idol worship. He agreed to go to Shirdi with his friend purely out of a 'clinical curiosity.' However, he set two very specific conditions for his visit. He told Kaka Mahajani, 'We will never bow our heads, nor provide any Dakshina.' Only after his friend agreed to these terms did he set out for Shirdi. This companion of Kaka's was described as being prone to doubts and suspicions, unlike Kaka himself, whose feelings toward saints were holy.