hi
what ever price you have calculated add 50% to it and thats what it will roughly cost , thats my experiance , i was once like you trying to budget. i did cpl at sfc at southend touch and goes about 20 pounds for the very first one and 15 pounds for all subsequent ones. one day did 9 t+g cost me about 160 in total , and i had to go to southend a few times.there are a lot of unforseen costs
cheers