[cma]

He hinted during QA it was 5% of BFR development costs, and Elon said a "material" percentage, which for expense reporting usually means >= 5%. Dev costs were said to be $5billion, so that would be $250,000,000.

[apendleton]

The questioner asked "is it more or less than 5%" -- I don't think they were confirming 5%, just repeating the number back (and Musk refused to say anything about the percentage at all).

[manicdee]

MZ said he wished it was (only) 5%, perhaps indicating the desire to see more billionaires stepping up to the plate.

[cma]

He said, "I'm happy with just 5%, thanks for the rocket."

[cma]

But the answer was, "I'm happy with just 5%, thanks for the rocket."