After the last few performances, how long will he be prepared to wait?
I think it's clear that Mandaric can't get anyone to work at city because he can't get anyone prepared to work with him. He needs to move himself out of the way. There are plenty of club owners who don't interfere with the playing side, they employ directors to do that job, and they get the right people- it's more important than the manager in many ways. Sadly, the great man's ego gets in the way of him doing this, it cost him at Portsmouth when he was picking bad manager after bad manager before lucking out on Redknapp, and it nearly cost him again when his behaviour caused Redknapp to walk out.
If he's not prepared to take his hands off the rudder, he needs to sell up, as he will never get a return on his investment while he treats the club (and us) as a toy.