I am looking at Ecuador for 3 weeks. I want to spend 2 weeks in a language program with my 11 year old son. Then free travel the last week. I was thinking 1 week in Quito, 1 week in cuencas, and th en 1 week at the beach, ideally in beachside low budget setting-is there such a thing? . I speak spanish. We want to use public transport. If y ou had 3 weeks only, what would be your "must see" areas?