Hi Judas

I'm a Permaculture designer living in Lombok
Ill be following you're project with interest
From the way it looks you have a good size and location, great soil, and plenty of water

It would be good to see the layout using google earth sattelite imagery, i find that very useful for understanding the land in and around a project site

I see you have a lot of Sengon nearby, that is good for increasing the soil fertility
Also on those red soils you have id urge you to do an experiment : mix rice husk biochar (Arang), red soil and cow manure. It becomes very fertile