Yeah...I always found that "we could get it from a rental house for 3/7, so no OT on gear!" argument a bit specious. First, an owner op is not a rental house...it's a custom selection of gear. Secondly, sure, they COULD provide the gear from a rental house, but what client wants to go through all the time and hassle to rent, insure, ship and return a package full of all the little extras we accumulate to make the job go more smoothly? This is a premium service we provide, and should not be equated with rental house services. Third, after we go over 10, not only am I still working, but so is my gear. The hour meter on the camera does not stop accumulating magically after we go long. Why is my time, craft and equipment suddenly less valuable at 10.5 hours into the shoot as we go into an inordinately long day? Fourth, the prospect of looming OT should be an incentive to shoot efficiently, not a get out of budget jail free card.
But that's just me. Before I moved to the SE, the majority of my clients out West either paid no OT at all, or did time and a half of the day rate by hour: say $100/hour day rate=OT at $150/hour.
Stuff like this is why I dislike setting a split between gear and labor, as opposed to a flat day rate. It just gives the bean counters grist for the mill.