If you just want to decide the top four, then group.
The draw is divided into three groups: group AB, three teams, group C, four teams. Group AB is the first to qualify, and group C is the top two to qualify, in a cycle.
Each group match is played in three venues, 2 1 ball, the longest 1 hour.
Play 15 ball or 1 1 ball per game. I don't know if you are divided into singles or doubles.
14 hour should be two days, which is enough to finish.