Thanks very much guys for your help, I can actually give a little bit more info it it helps, would you have a more accurate idea for a rented 172N/M and only looking at 3/4 small strips/airfields again with the same leg length and say a 5 nights at each field
Again thanks so much!
In that case you can easily figure it out by yourself in detail.
Just do the usual flight preparation and add the other costs.
Excel will be your friend.
Your thorough flight preparation will give you:
* route planned
* flight hours planned
* airfields
* towns and locations
You have already
* daily rate
* hourly rate
* fuel flow from POH (assuming dry lease)
Just sum up:
daily rate times day rate
+ flight hours flown times hourly rate
+ fuel consumption from calculation times fuel cost
+ landing fees from the internet
+ accommodation from hotel/pensions planned (tent possible?)
+ ...
+ don't forget Oil, at 20-25 hours you may most probably need to re-oil some quarts in a C172.
I suspect you will end up at about £ 1.75 to 2.5 per mile flown for a C172N.