Well I don't know what your budgets are Daphne, or the client's expectations, but I've driven on a few shoots for adverts filmed in Dubai and been paid a Thousand Dirhams for my trouble, each day. And that was in cars provided by the car companies for whom the adverts were being filmed, and at locations within 30 mins drive of my home. Video and film production ain't cheap, and if you need props like fast cars, and drivers prepared to show them off, you need to take into account the hours spent driving to Jebel Hafeet and back (that's close to a four hour round trip from Dubai for example at legal speeds), the tyre & brake wear, and the petrol, plus a consideration for the 'performance'. At the very least I'd say you need to price up renting something like a Porsche 911 for the day, and doubling that amount, per car & driver combination. Which should take it to at least a couple of thousand I'd guess, probably a lot more?
I'm not trying to put anyone off, or cause you a problem - quite the opposite. If you are doing things properly, with permissions and insurances in place, then the cost of reimbursing a handful of 'performers' shouldn't be a problem in the grand scheme of things.
Edited;
And can you please tell us how many hours you'll need your drivers on site - and what hours they are? In my experience, I've been required on site one hour before sunrise, and left the location pretty much one hour after sunset, each and every time, because the light for filming is better during those "golden hours" of dawn and dusk. But that usually leads to 10 hours of monotonous boredom between the two!
