When Sai Baba's health was failing, what were Bapusaheb Buti's specific worries regarding the mansion he was building?

As Sai Baba fell seriously ill and his end seemed near, Bapusaheb Buti became very uneasy and anxious about the mansion project. According to Chapter 39, his mind was filled with regret. He worried, "What will become of this mansion now?" and questioned if Baba's feet would ever touch the temple he had spent lakhs of rupees on. Buti's heart was troubled as he felt that without Baba, the mansion and the Murlidhar temple would be useless. He saw Baba's declining health as a major obstacle that could render his entire effort and expense meaningless, causing him great distress.