Huge Trucking Company- Need Advice Please

[Hillbilly]

I've been given the OK to put in machines at a huge coal hauler in my area.  They have about 135 trucks that run 2 shifts a day,six days a week. So that's about 270 people per day and about 30 support people in the shop and about 15 people in the office.  The drivers are only there at the beginning and end of their shift unless the truck's are getting worked on.

The problem is I know the machines will be abused, get really dirty. Would you still do it? What machines would you put in?  I want to keep the product simple. Gumballs and 1 candy.