If you're thinking about staying in Greece, please consider staying at the traditional farmers secret caves. This place is perfectly located as it is close from the most amazing beaches in Santorini and still holds the vibe of what Santorini likely was before the tourist era (the drive to the apartment is quite epic/challenging). Each caves being independent, it's quite perfect when you're travelling with friends.
But the best thing with that place is Theo himself, he is SO helpful. He found us a car rental company that was cheaper and provided cars in awesome condition and arranged a pick up at the airport for a small fee. Overall, he has been one of the most accommodating host I've ever have to deal with.