Mark and Carrie have holidayed on beautiful Crete many times and now want their own holiday home in Rethymno on the north coast. Famed for its gorgeous old town, Rethymno boasts a pretty Venetian harbour with a rich history, lined with tavernas serving magnificent food, and is dotted with historic monuments. Laura Hamilton shows Mark and Carrie what their maximum budget of £130,000 can buy, from an enchanting characterful house to a blue and white beauty and a quirky cottage in a sublime setting