Harsh to charge for something like that in all honesty
I think you'd feel guilty about it anyway.....
Team drivers in the past have always had a responsibility to help out newbies / youngsters with Set-ups and driving tips where possible so i don't think it is something you could reallllllllllly charge for........ I remember starting there were loads of really helpful people around that did loads for me and my Dad when it comes to set-ups and driving, i think it's a very Natural progression in this sport, and only practise makes perfect.
I think my problem with it is that there's only really SO much you can teach someone as you're only really able to talk about it - doing it is another thing altogether, especially on the driving side of things i don't think there's that much you can teach someone in all honesty.......... i agree you can advise someone to drive smoother, or take better lines here and there but if they've not got enough control of the car already they won't be able to follow instruction you know?