The pilot reported that he was taxiing to the run up area when the right wing collided with a chain link fence. The right wing tip tank caught fire, and the airplane turned to the right, coming to a stop with the nose into the fence. The right wing sustained crush damage and fire damage. About a year before this accident, the airport’s water well had become inoperative, and a new well was installed with the chain link fence around it, closer to the taxiway. A Federal Aviation Administration inspector reported that the fence line (on the right side) to taxiway centerline is 19 feet. The tree line (on the left side) to taxiway centerline is 25 feet. The airplane's total wingspan is 33 feet.