Before you think about some Costa Blanca property around this coast of Spain, make sure you check the areas around together with friends or local property agents. Make sure you have already spent some time not just in summer around Costa Blanca, so you know the place from both sides of the coin during summer and during winter time.
Some practical Costa Blanca Property buyer tips

Get a good map of the entire coast and of Alicante.
Rent a car at the airport, in order to be mobile and independent.
Some places along the Costa Blanca sometime feel deserted, particularly in Winter times.Visit and revisit again the area where you want to buy property.
If you plan to buy property around the Costa Blanca, rent different villas and flats around the area beforehand. Make sure you have stayed at the area not just during day time, but also at night. Noise may sometimes change a lot.
Check public transport in the area, as well as day and night traffic. Go for quiet areas, but make sure it's not too quite because isolated areas often attract unwanted visitors at night.
Take your time and don't rush in finding the right property.