Can you explain the specific events that transformed the Buti Wada from a planned Murlidhar temple into Sai Baba's Samadhi Mandir?

The transformation of the Buti Wada was a direct result of Sai Baba's final wish. While the mansion was originally being built to house a Murlidhar idol, Baba fell seriously ill as it neared completion. As narrated in Chapter 39, just before he passed, Baba gave a clear command, stating, "Place me in the mansion." These were his last words on the matter, which made everyone certain of the building's new purpose. Consequently, after he left his body, the holy body of Sai was placed in the inner sanctum, and the mansion officially became the Samadhi Mandir.