SpaceX's Falcon Heavy was developed on a budget roughly equal to 10 days worth of NASA's annual funding.
It would be like saying "angry birds was developed with 10 days worth of Microsoft's annual budget".
NASA's 2020 budget of $22.6 billion from here: https://www.planetary.org/get-involved/be-a-space-advocate/b...
22.6 billion * (10/365) = $712 million