The cheapest way to use a car in Santiago de Compostela / Spain and Europe, for over 17 days, is normally the Tax Free car lease - leasing programme. Car Lease - Leasing is an ideal low cost alternative to car rental, particularly for long term use. The longer you have the vehicle, the lower the rates become. It offers great flexibility with an extensive fleet from which to choose. These include cars, station wagons, convertibles and people movers / minibuses.