These cars start at around 400 yen for 30 minutes so the love hotel is more expensive, and they typically want to rent for a block of a few hours, but pricing usually works out to around 1000 - 1500 yen ($10 - $15) per hour at a love hotel.

Of course, you get a real bed with a love hotel, so it might be worth the extra if all you want to do is sleep, though the walls aren't super soundproof.