Don't know where I should post this, but the Wiki lists "Sex Fighting Ring" in Personal Discretionary Funds as "20%", but it is 25% in-game. If it gets negotiated from there, I wouldn't know, since I only have 20% to spare and it claims it needs "...a significant investment." So regardless of whether it takes 25 or 20 percent, it needs at least 25% to be fundable. If the price is reduced later in Chapter 3 or as a hidden result of some other Investments, that's information missing.