I've been avoiding saying this, because I have this horrible fear I'm turning into Mr No Opinion But Passes On Info From Magazines, but the ex-editor (and still contributor) to EVO magazine has a Zonda. An S, with bits from the F, iirc.
He tries to use it daily but it lived in his garage over the winter. It's now back up and about for his daily commute - last car he had was a Ferrari 550, again used as a daily driver.
This is alongside a Clio 182 Cup, a Clio 197, a Lotus Exige 340, a Fiat Panda 4x4, an old Range Rover, and a new Maserati GT...I wish I lived like that.
So it is possible to own one, it is possible to own one and use it (almost) daily, but I guess Hammond doesn't need it. Or it failed the 'wife test', I guess. He can get away with taking the kids to school in a 911 but you can't do that with a Zonda unless they sit on the rear spoiler.