If that's what it takes, by all means they should get it. I think the best advice then is to simply make the offer as remarkable as the ambition, so we all get on board.
Edit: I did't mean to suggest the goal is unreasonable or unattainable. I was just trying to explain the not-positive reaction I had to seeing it. Like shopping, not all price reactions are logical.
In this case, it's not a matter of presumption, it's a matter of knowing the reality of what is involved in actually building this thing.