The pilot reported that he was on the third or fourth landing of the day, when a wind gust struck the right side of the airplane during the landing roll and the airplane veered to the right. Despite the pilot’s control inputs, the airplane continued turning to the right, the left main landing gear collapsed, and the airplane came to rest along the edge of the runway. The airplane’s left wing sustained substantial damage during the accident sequence. The pilot reported no mechanical failures or malfunctions that would have precluded normal operations.