The tent will be using a special insulation that I'm testing....same as what's used on NASA shuttles.
NASA? Dude. For cost/ R value, it's hard to go past expanded polystyrene or polyurethane. SIPs are a very cheap and quick way to build, certainly easy enough to do most yourself, and you'd be spending time solving questions of preference rather than viability. Alternatively, you and a friend would put up basic steel or timber studwall and truss roof framing in a week. A contractor would have the place roofed and sided in the same amount of time and you'd onto services by week two. The yurt, being unconventional, seems like it would involve a lot of solution finding time.
Post up some specs and plans if you can. Obviously I've got my doubts but I'd be interested to see what you're proposing.