I'd have thought a simple wax/polish would take about half an hour (considering that I used to polish my cars in about an hour, and I'm shit!) and was thinking £40-£60 an hour would be very good money for whoever is doing it! 2-4hrs? It's a car, not a boat!
Kam, bit far from you though, but thanks for the offer! If you want, PM the price and I'll let you know, but that depends if you're a mobile valeter as I don't really fancy driving to Slough and back! Car's lucky I drive it 5 miles to get a wash