If the classic rent-versus-buy debate in Manhattan real estate were a building, instead of a debate, it would be pre-war. But as old as that debate is -- and as academic as it is rendered by the high price of a Manhattan condo and the comparatively advantageous market for Manhattan luxury rentals -- it's worth remembering that renting in Manhattan isn't just for those who can't afford to buy in Manhattan. Let's take Kings of Leon singer Caleb Followill, for instance.