Add a premium for out of hours - if we do Saturday or Sunday work the guys get time and a half or double time so the price rises accordingly.
Other than that if you charge for example £2 a square meter and the job is 1000 meters sq then it's £2k
No matter whT time you do this you will need cones, barriers, hi viz etc... And possible a licence to close footpath and or road, depending where your working.
Anything over 20 miles away I add on 2 hrs minimum for travel
Darran