Paul
Do yourself a big favour and wait. By all means do the research, but please don't buy now. Spanish property is the most expensive in the world and where ever you look around the world property prices are falling out of bed and with good reason. We are about to go into a worldwide depression the likes of which has not been seen since the 1930s, property prices have a long long way to go.
Do not be fooled by "bargain property" and people telling you its a great time to buy, most if not all have a vested interest. A typical two bed apartment in Spain yields around 2-3 pecent gross. Nett its hardly worth the effort. many people are now finding that its almost impossible to rent property there is such a glut.
You may not want to rent, but this is not the point. The yield is telling you Spanish property is massively overpriced, by a factor of 100% even given recent falls. Prices were bid up by foreign money and easy finance and the belief that prices will always go up. Think about it, every one of these factors has gone! Foreign money has all but dried up due to falling prices at home and the recession, not to mention the GBP/euro fx rapidly approaching parity. Easy finance has gone and lenders now want 25% min. And finanly the myth that prices never fall has trully been shattered.
Many of the recent built faceless apartments will be unsellable at any price, volumes are down by 100s of percent and unemployment in Spain will be in double digits next year. Its estimated that during the last few years Spain built more property than the whole of europe combined. A lot of that is now sitting empty!
By all means buy your dream home in Spain, but don't do it now. History is littered with buyers who buy in a falling market thinking they have a bargain, only to see their purchase fall in half again. Bargain property does not yield 3%, even if it was formally on sale for twice as much.
The fact that "the bank" valuation was 400k and now its on sale for 250k, does not make it cheap or even a good deal if the 400k was four times too much! Property prices are falling around the world with no end in sight. Prices are falling still in the US and they started before Europe. The average house price in the US is now 98k pounds and is still falling and for that you get 3 bed 2 bath and some land. This is the most advanced country in the world - imagine what is going to happen to Spain where local wages are perhaps 1/3 of that in the US.
Good luck with your project!