Ever since Terry Windle and Julia Lenart got together 15 years ago, they've dreamt of having their own place in sunnier climes. Now, with retirement on the cards, they're looking to escape the British winters for half the year and live a more active life. After extensive research they've decided Gran Canaria is the perfect place for them. Scarlette Douglas shows them five properties for their £100,000 budget, but will any of them meet Terry's exacting standards?