In HS, I put a time limit on the other team by starting ours with about 40 minutes before game time and taking about 15 then they had about 15 minutes by the time we traded. I always went first as home team. Had a guy take 30 minutes one day and finally had to have umpire tell him to get off the field. He had 4 coaches hitting balls to everybody, 25 players. I told him it is in and out not a practice.