Industrial (Oil/Gas/Materials) repairmen. You're talking a few 100,000 for every hour they're not pushing product. These places are located at the resource, not

Industrial (Oil/Gas/Materials) repairmen. You're talking a few 100,000 for every hour they're not pushing product. These places are located at the resource, not where employees are so you're likely going to need to fly someone super specialized in the maintenance of this one item half way across the globe.