It is nice to know that Spain is in people's sights for a bargain. However, buy beware. Do not do in Spain what you would not do at home. Research s the key and a good independent solicitor is a must.
Reading through some of the messages there is the usual anti but there is some good advice comming your way. From my understanding of the market time is on your side, I do not believe that prices will rise in the next couple of years, so take you time and research your market
Here is my plug, you can always rent my Spanish apartment while making your mind up, here is the link
http://www.rentalsystems.com/book/spanishgetaway/
Happy hunting.
PS, £50000 will buy quite a few Vodafone shares that return approximately £2500 - 3000 pa, which may buy you a reasonable holiday every year, well 5 - 6 months rental of my apartment for sure.