I believe you are enrolled in the 401k the day you start and have to opt out.
$25 an hour for an instructor? Not hardly. Couriers make more than that, plus I believe there is a max of 3 students in def. driving and 5 in courier class. Our last new hire flew to Denver twice for both classes. He showed me his pictures from Red Rock. Those trips with his salary, meals and hotel, car and airfare were 3 or 4k. You are still not considering the associated costs that start from the time a person fills out an application. A background check is $100 or so dollars, a Dot Physical is maybe more. CDL fingerprinting is about $85. Couple hundred in new uniforms.
Doesn't matter the exact cost. I believe a station would rather have a roster full of veterans rather than a bunch of new hires. Even if a new hire is $10 hr cheaper than a veteran with pension and salary, you just don't know how he will pan out or stick around. A 30 yr veteran has already shown you.