"Fakir" is not someone who has nothing. He's someone who is not. The mere condition of being "Fakir" includes the ability to forgo the sense of self in the pursuit of God or the one unvarying truth. "ki puchde O haal fakiraan da" is a rhetorical question to the viewer, which just enquires that how can you ask about the well being of a being who has just ceased to exist. The one who is not. Who will not be. If you really wish to know the "haal" of a "Fakir" then the path of forgoing your own self is wide open for you!