This is certainly not a definitive answer, but my understanding of mortgages in Spain.
I shall work on an exchange rate of 1.25 Euro to the pound.
It looks like your maximum budget for a home would be about 75k (Euro); this has not been determined by your income, but by your deposit.
You would have to stump up 20% of this figure (15k) as a deposit and another 10% to cover costs (7.5k) which would leave you a few thousand out of your 25k to cover mortgage set up costs (where applicable).
Depending on your age the banks would require that your annual earnings are between a quarter and a third of the 60 grand mortgage, a third being 20k Euro and a quarter being 15k.
Whether there are acceptable properties available in that price range is something that you need to come over and find out.
I can't see any Spanish bank having a problem in lending on a habitable property as long as you can prove that you have the means to pay.
Also bear in mind that banks here do not muck about. Go three months behind on your mortgage repayments and be prepared to say goodbye to your home.