I have another one question : How many run can i do per day
Like Maxton, there is no limit on the number of runs. How many runs you get depends on the number of entrants, number of delays (weather, oil downs, problem with the clocks, etc) and how quickly you can get back to the starting area while obeying speed limits in the pits and on the return road. Good luck. Sad I can't be there . . .