If we're being hyper specific, the Yu Suzuki interview said "probably $20 million". Whether he's rounding up or down is at your own discretion.
I've also found the source of the Yen figure I was talking about earlier, it's from a YouTube comment on IGN Japan's post-release sit down with Yu, Keiji Okayasu, and Hiroaki Takeuchi. I'm assuming the figure is sourced from the video, but it's pegged at 1.34 billion Yen which I believe was around $12 million circa 2019, which is backed up by Spud's old post here:
Don't believe Switch's summary of the sit down mentions this figure, so can't verify how correct it is.
I've also found the source of the Yen figure I was talking about earlier, it's from a YouTube comment on IGN Japan's post-release sit down with Yu, Keiji Okayasu, and Hiroaki Takeuchi. I'm assuming the figure is sourced from the video, but it's pegged at 1.34 billion Yen which I believe was around $12 million circa 2019, which is backed up by Spud's old post here:
In the recent sit down video with IGN Japan I'm sure youtube subtitles said it came in at about $12million including the kickstarter money. So around $5million in external investment.
If the Epic deal went straight to Deep Silver then I'd suggest alot of this was already covered before the game went on sale.
I'd wait until it's been translated properly to confirm.
Don't believe Switch's summary of the sit down mentions this figure, so can't verify how correct it is.