Interesting points, however I would offer that Hawaii has MANY microclimates depending on island, and Big Island is probably the most diverse. The relocation to Hilo is just about 20 minutes from a rainforest where I happen to have property, and there is NO sandy soil. I believe they are located in Hilo which is MUCH warmer and sunnier. Sounds like both Hawaii Island and Puerto Rico both need solutions for low-resourced communities, but certainly if a workshop is offered in PR, I'd consider visiting!