In reply to mikeconway:
Hi Mike,
the other main spot for cheap accommodation is the finca campana
http://www.fincalacampana.com/. got a good international feel and friendly place. i find it a bit noisier so prefer the olive branch. i'm out here till mid jan and tend to always travel out on my own. never had any trouble finding people to climb with. if you're stuck give me a shout.
there are a couple of refugios in the village which I don't have any details on but i'm sure you could google them. again i find them very noisy, so only go for a wee drink at them for a bit of craic.
you don't need a car once you get to chorro but there are no significant supermarkets in chorro, so it's worthwhile getting a pick-up from alora with a stop at the bigger supermarket there. Gary at the Olive branch offers this. pretty sure you don't have to be staying here to make use of the service.
from the airport you can get the train to alora for 2.20euros. get a train towards malaga and change at victoria kent.
once at the finca, everything is walking distance.
hope that helps buddy. give me a shout if you need any further info. been coming here for the last seven years so can hopefully answer most queries.
J