Bluntly, my opinion here would be that this isn't a viable option for a startup, unless they have access to easy angel capital or can self fund to that amount.

Developing an idea with that price tag is an is a risk orders of magnitudes higher than a low cost startup. Having a hit is hard enough, but you'd need a run-away smashing super hit to even break even.

Even if you choose that path, there are still aspects of the idea that can be harnessed and build at much lower costs to begin income generation to help fund the remainder of the idea.

Investing money of that amount into an idea that has yet to prove itself is not my idea of a good move, really.

EDIT - Curious, what problem space are you thinking about/working in that requires that level of funding?