Hi Spanishsteve
I am in Roda just outside of LA and about 15 mins cycle ride to the beautiful beaches with 5KM of promenade for walking or cycling. The whole area is very flat so ideal for cycling and there are numerous cycle paths beside the roads.
LA is only 5 mins from Murcia (San Javier) airport which is a great asset, plus a new international airport is being built at Corvera about 20 mins drive inland. Because of this a number of golf courses and complexes have sprung up in the surrounding area.
The towns of Murcia and Cartagena are both within easy reach and have a great mixture of history as well as shops.
LA itself is a great mix of old Spainsh with some newer British urbanisations and offers some good restaurants and tapas bars. The buildings are generally low rise which is very pleasant especially along the sea front.
The old part of town is full of narrow streets and a little crowded in summer, very difficult to park and not particularly attractive but seafront and surrounds are supplied with parks etc.and is generally tastfully built.
There are a number of supermarkets to chose from as well as 2 local markets each week and a reasonable mix of local shops and hotels.
I believe the actual figures for population are close to 15,000 rising to 100,000 in summer as town is full of holiday homes with many Spaniards coming from Madrid.
Depends on the type of place you would like to retire to but I would highly recommend the area.
Best of luck