I have heard hundreds of people talking about this, and known VERY few to ever follow through. I wouldnt get your hopes up Emma Jane
@eviscerate- Its not that uncommon, and actually when he bought it, he didnt even know it had houses. I wouldnt call them houses so much, rather ruins (which are fucking everywhere in Europe), but in a state that they were reparable. I think you could easily find something similar, if you just searched for it a bit (even in the states). There is a lot of land that is so rough you cannot build there easily, and goes for near to nothing. look around in montana a bit, I know some people who have managed to buy 600 acres there, of undevelopable land, for really cheap. Some other friend were looking at property in Greece for 4.5k, I forget the size of the parcel, but also quite large.
In spain, on the south side of the pyrenees, its not so bad. If you are actually "in" the mountains, then yes, its gonna be harsh, but at lower altitudes on the south side expect temperate climate, mild winter. a lot of the untouched ones, you can expect at least a 40 km drive to supply. better to come out once in a while with a bus and large stocks of dry goods (and the first few years, you wont be sustainable, so I wouldnt think of wintering over untill you didnt have to leave for supplying. the roads arent that great out there. think late spring to early autumn, for at least 3 years, to prepare the land, and restore some of the buildings. Need people who can farm, and get some animals out there when you are finally going to stay. after 3 years prep, you might be able to have something up and running that you would only have to go to town once a year to supply, and hopefully can trade with you neighbors for what you dont grow (olives are everywhere, oil is a commodity...)