Feels like $175,000 is on the high side for a bed. And we mean high.

So when Savoir asked Loot to try out its new Royal State Bed at the Swiss Institute in SoHo, we had to go lie down on it.

There was talk about the hours involved in its creation (604), the silk thread (2,624 kilometers), the stuffing (horsehair, cashmere) and the number of buyers so far (1; Chinese). But when Savoir's president spoke of the 25-year guarantee ensuring the bed cost only "around $20 a night," it struck a chord.

Let's say you have that kind of money. How much does your sleep actually cost? Loot broke it down.

Say you buy the bed when you're 40 and use it for the full 25 years. That's $175,000/ (25 years x 365 days), or about $19.18 a day. If you can afford this bed, you either sleep a lot (inherited wealth) or very, very little (hedge fund management). If you have $175,000 for a pile of horsehair (however exquisite that pile of horsehair), you probably have the cash to get away from it, but let's conservatively assume you're a homebody.

If you inherited the money, let's say you get a luxuriant nine hours of sleep a night, which comes to $2.13 per hour, or around a quarter of what you'd pay in gas to drive a Mercedes S Class on the highway (31 mpg at 65 mph, with a gallon of gas at $4). Not so bad.

If you have to get up early to make the money yourself, it gets a bit more expensive. Say you sleep 4.5 hours a night (Asian markets!), which comes to a robust $4.26 an hour -- roughly half of what you'd pay in fuel to drive the S class. Fall asleep in your car and the cost of the bed gets outrageous.

You can always hide your money in your mattress. But where do you hide your mattress if it's made of money?

James Tarmy reports on arts and culture for Bloomberg Muse, the arts and leisure section of Bloomberg News.

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