Most Expensive property in London(may be in the world)

I find an interesting artical.

I am going to introduce you about the most expensive property to rent.

'At £40,000 a week, this stunning house just a few feet from Hyde Park is the most expensive property to rent in London.
Located in the infamously luxurious Mayfair part of London, this estate features the highest level of security for its tenants. With staff quarters at the back of the property and many modern accents, you can’t wonder why this London house is the most expensive rent in the city'

I know that Mayfair is one of the most expensive area in London.

But, I do not get why it is such an unbelievably expensive rent!

Of course, the price of land and houses in London continuously have been growing up.
Even so, It is really expensive!

I want to know who can rent the property.

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