Hi Hy,
What would the armature be for the chip/slip? Wouldn't or couldn't that be a Larsen truss? Or are you thinking a slipform?
I've been in a few wood chip clay houses and I'm bothered by the airspaces between the chips and it seems the proper mix ratio and size of chips is very hard to control. There seems to be lots of air movement (=drafts) even after plastering. I like the idea of making bricks of chip/slip (like adobe) and then using those; no form required and you have more control over the density.
One important criteria to add would be ease, efficiency and economy of construction labor. That's the big advantage of SIPs, of course, in my opinion. Many of the owner-built and natural systems are labor intensive, and if you couple that with inexperienced (owner) labor than it's even more important that it be relatively foolproof.
The real solution is to move to a beach palapa in Mexico...