Hi Jay,
Thanks for the questions. I assume you followed the link to learn more about the instructors and our infrastructure before responding, but if not I'll share some more links.
We employee this pricing metric for a number of reasons and have been operating all our workshops this way for over a decade. The reduced price for Central American's is essentially a scholarship as you mentioned, this is tied to that fact that many in CA would be priced out at the full rate. The reduced expat rate exists as this is one of the communities that supports us the most, they are often our repeat customers, they buy nursery material, employ our services as design consultants, and we want to encourage this relationship. It is also tied to the fact that most of the expat/resident participants are doing similar work as ourselves without the benefit of a full-time job with US based wages, we want to build the Costa Rica permaculture community as much as possible. In the end our goal is to create as diverse a student body as possible, and pricing based on geographical location allows us to to this.
We've been in operation and successfully running workshops such as this since 2001. We are widely considered leaders in this field in Latin America.
We only work with the top instructors in their field. Both Ryan and Liz have extensive experience, which you can see on their respective websites below.
Ryan Chivers
http://www.artesanoplaster.com/home.html
Liz Johndrow
http://earthenendeavors.com/
To see more about our campus, take the time to look at the Accommodations Page on our website:
http://ranchomastatal.com/pages/links/page.php?Grouping=Accommodations&PageName=rooms
Or here is an album on our built environment on facebook:
https://www.facebook.com/media/set/?set=a.589169821103024.1073741825.162868273733183&type=3
Please don't hesitate with more question,
Saludos
Scott