The riichi isn't particularly relevant since this is a yakuman level hand anyway. Big Four Winds is a 16,000 point hand, depending on ruleset. Total payout is 4x hand value or 6x hand value if Koromo is dealer. Best case scenario is a double yakuman as dealer for 96,000 points.
Suu ankou, dai suu shi, and tsou ii sou. Depending on the ruleset, it's either a triple or a quadruple yakuman. 96,000/128,000 for nondealer or 144,000/192,000 for dealer.