You need to be much more specific! It is impossible to quote with so many unknown variables -

· Access
· Quality of topsoil
· Amount of levelling needed
· Once rotivated will the soil need de-stoning
· Type of turf e.g. are areas of the turf in shade or partial shade – if yes then may need to use more than one type of turf…

I could yap on all day, but I’m sure that you get the idea.