Hi:
About my town. Currently I'm living in Azuqueca de Henares (Guadalajara). The population here may be around 25.000 inhabitants. Here there are people from a lot of countries that come to Madrid to work and live here because of the cost of the life is cheaper than in Madrid City. So, population in Azuqueca increased extremely quickly until the economic crisis. No, a lot of them are returning to their countries. so, currently there are a lot of empty flats.
Best regards