I'm working up some barn plans. The attachments show a monitor style. The main section is 30 wide, 50 deep. Wings are 15 wide. Right now, I'm thinking sliders for doors--first attachment. On the wings, I'd have tracks sticking outside the barn at about 8 feet high. I'm worried about running into those with a tractor or something. I'm sure everyone's going to say go with overhead doors and I might do that; the second attachment shows overhead doors. Any comments? I want security and I'm on a tight budget. Thanks.