Did you read ACM Bhadoria’s comments?What you are suggesting is the american model. Bro, in order to do that you need an incredible amount of money.
Did you read the article? Private companies are hesitant to join SPV because of financial risk. What you are suggesting is that they build a prototype to compete with a different prototype, and best one wins. This is hugely risky, as if their prototype gets rejected they will suffer losses, which is exactly what they dont want.
This is most brain dead suggestion for indian context.