I believe the best option to develop SDV is to involve a...

I believe the best option to develop SDV is to involve a strategic partner or deep pocket investors (reputable - convertor, battery / electric car manufacturer, or heavy weight trading house).
Based on NPV of US $1.4 b, relinguishing 20% stake will pocket GXY around $300 m, more than enough to bankroll and develop the project in accelerated manner.
If the management opted to go alone (100% ownership) , funding issues will be a drag for the next few years. It will be subjected to constant bickering and attack from shorters, down rampers , anti CR brigade on any news / rumours - good or bad and also become a plaything for opportunistic immoral fundies like the Silver Donut or UBSucker to ramp up or ramp down the SP at the expense of small time shareholders.