As said above best thing is to get yourself on a flight and stay over, walkabout, find nice locations that suits your needs.
Some of the ideas that went through our head when deciding were.
We decided on Jardines two bed for upper terrace only issue is for times we come out of peak season can be quite breezy as never realized we would be on top/side of a hill. in peak season, too damn hot for me to lay out. Glad we got west facing so I can sit out front and pop in out as required.
Discounted lower 3 beds as more expensive for tiny 3rd room but later saw a 3 bed setup as a 2 bedroom with useless oven of a small bedroom had been knocked out to form dining area. Much nicer.
Note: end of block apartments (corners or adjacent to path through block) have windows in bathroom that midblocks obviously do not have.
Prices- have seen as low as 57k euro
Would be careful of headlines, I;m sure these are maybe blocks without pools. Also here standard of build can vary, with a few complaints around damp particularly with penthouses. Need to check up on additional fees as think you may pay 10%+ in taxes etc. Also factors fees say 100euro's.month + bills.
Completion- do any of the resorts look like a building site
Compelete in that whatever started was finished, just have large areas of dusty boundary land.
Facilities- food, drink etc
If in need of home comforts little britain (camposol) is just 5 mins away for curry's, chippie, italian, bulgarian etc. Or head to alhama/mazarron.
Transport links- bus, etc
Unless you confine yourself to site (bit of a waste) just use a hire car, reasonably cheap by time you factor in airport transfer costs and most places a few hops away. 30 mins away is Murcia for IKEA, larger shopping areas, Eroski/Carrefour, Leroy merlins for all your bodging needs, Cartegna is good to. Read once Murcia is one of best shopping areas people travel several hours to come here. Personnally wife likes the small independant shops.
Furniture- best/easiest/cheapest way to do it
Shame on us, we went with IKEA as everything in one place so wife just shopped using catalog before we went out. They delivered sofa's etc for not a huge amount so no big van required just a Berlingo.
Aircon, paid lots for nice system mainly used at night but too be honest find either freezing when it blows or cooking as doors/windows shut.
Sat TV- costs, etc
Couple of hundred euros' for TV and Wifi, More British channels than you need.