Lived in Benidorm 10 years ago. In the 1950s it was a small town in Spain. My relatives showed me photos, it was lovely! Now it has hundreds of hotels and hondreds of thousands of tourists coming there yearly. After tourist boom property there costs really much! But judging by the pics at
https://www.realestateespanol.com/ I can say that it's has changed greatly for the last decade in terms of real estate conditions ) perfect marine resort!