The minimum rental period for private villas used to be one week, however, Manu villas accepts also bookings for 3 nights in Low and Mid season and 7 nights for Christmas and New Year only. 

And don't forget, Costa Rica is not London, Hong Kong, Tokyo or New York. It can happen that there are power failures, and only few private villas have a power generator as back-up. Dinner by candle light is romantic, but it also means your air-conditioning, refrigerator, TV and the water pump aren't working. It may also happen that your satellite TV is dead for a day or two – especially during the rainy season.

Just relax – that's what you came for to Costa Rica, right?