you really could have tried the search function or even just looking at the other forums seeing as this has been asked several times in the last few days.
around £100 a day, each is a good base to aim for, some days will xost more, some wont.
though it can be as expensive or as inexpensive as you like.
tyr searching for terms such as "price" "cost" "spending money" and you will get a better picture what you want to do and where you want to do and a better idea of what things cost.
also try reading some of the reviews people breakdown what they have spent.