Developing Coniferous Bonsai course by Bonsai Empire is very popular
$65, 23 lectures, 10 hour total
See contributions of Maura Stemberger, Jan Culek, Harry Harrington and WP. This is for all levels. We have made sure to include very affordable materiel on which we teach styling of conifers. The image shows a European spruce that had a price tag of about US$ 100. We make sure that what we do is down to earth, close to the real bonsai world but still top state of the art work.
For only 65 bucks you get 10 hours of world class teaching. This will be your best investment in bonsai.