HIGH HAND ODDS SIDE BET

So I'm playing poker the other day and someone at my table has the high hand of the day with quad 8's ace kicker. He is in line to make $2500 if this hand holds up. He offers to sell stakes in his high hand for 4/1 odds. There was 45minutes remaining in the high hand time. There were also 12 tables of poker going on. You also must have 2 of the 5 cards in your hand and the hand has to go to a showdown. With a table having an average of let's say a hand every 3 minutes (or whatever you believe), 45 minutes, 12 total tables, needed quad 9's or better, and 2 whole cards. So wizard was it a good deal? What were the odds of his hand holding up?