I would say:
It’s easier to list the expensive places to avoid if you are price driven:
-North Costa Blanca
-West Costa del Sol
But they are also some of the nicest places. That’s life
Yes getting a good location and a bargain is the holy grail. I think it’s better to look for the location you like first, get to know the market for that area, and then look for value. Starting off just looking for the cheapest areas will introduce risks – cheap areas are usually cheap for a reason!