Our flight on Jan 2 leaves GIB at 3 pm, and we expect to return our car at La Linea around 11 am. Check in opens 3 hours before, so if we drop off our bags around noon we will have between an hour and a half and two hours to sight see. We are a couple with a 2 year old. The official rock tour costs 150 pounds for 2 hours; are there any cheaper options? Can we just hire a taxi for 2 hours and how much will it cost?