Mark – If ‘information is power’ I think you should also point out the law and restrictions relating to vacation rentals in Grand Canaria. This law enacted in 1995 was not really enforced until recently. Teams of inspectors are now tracking down owners who advertise holiday lets in residential developments which is regarded as commercial exploitation. Fines are heavy. Catalonia are also enforcing this national law which has been left to autonomous regions to implement. Some information here.