If you wish to become a Yoga Instructor, then you should opt for Yoga Teacher Training rather than Yoga Teacher Retreat. And, if you like to take course in Asia, you can try India, where you can get 200-Hour Yoga Teacher Training at the very reasonable price and also you can get deeply established in the life-changing practice of Yoga.
I would recommend Yoga Vana, a Yoga Teacher Training School in India for 200 Hour Yoga Teacher Training. Yoga Vana provides a warm and open learning environment to intensify the personal Yoga practice and to deepen the understanding of the philosophy and science of Yoga. They support the trainees throughout the course and beyond in developing the skills and confidence to be the teacher.
Yoga Vana conducts Yoga Teacher Training at a secluded hill station ashram on the Maharashtra-Goa border. It is open to only a small group of trainees, the Teacher Training Course allows trainees to closely interact with the teachers' team and receive individual guidance and inspiration for their own practice and teaching capacities.
Yoga Vana gonna conduct 200 Hour Yoga Teacher Training in India at Nov 2019: https://yogavana.in/calendar/200hr-yoga-teacher-training-india-nov-2019
It allows you to book your seat through online, check the Yoga Teacher Training Syllabus, location, accommodation, fee structure and more at: https://yogavana.in/yoga-teacher-training