Another big issue in there is about carbon footprints. The original poster wants to be envionmentally friendly. But seems to expect tourists to fly out there for holidays. I've got nothing against foreign holidays, although some people might.
Carbon footprints, food-miles, and issues about growing food at home versus imports, is a related and controversial, subject.
A key idea behind that project is the idea of escaping to paradise. This is a big philosophical subject. Some people would say that the entire idea is an illusion. And there are lots of viewpoints about that.
One small thing - I noticed something in those websites about growing bamboo to eat. That's a novel idea that might appeal to some gardeners here. I grow a lot of bamboo. But I'm not intending to eat any.