First you have to decide when to spend a holiday in Crete.
In case you can choose freely you can find more details about the holiday season and weather conditions in southern Crete here.
You should stay at least one week in Prasoniro. In case you find a more favourable flight prior to or past your reservation and the house is rented out during those days I can help you find accommodation nearby possibly in a Greek guesthouse that is not on the internet yet.
Price:
75€ /day
or
500€ /week
incl. Bedsheets, towels and teatowels
+50 euro one-time fee for final cleaning