[Londoner]

Insides always take longer than you think they are going to. Its just the way it is. You are still earning though. loads of people would think £80 for 5 hours work is brilliant. You could labour all day on a building site for a lot less than that these days.
You should use a roll of blue paper if you want to rather than kitchen paper. I always have a roll in the van from Selco or toolstation. But really it sounds very much like an example of  its time you lot learned how to use a shammy to me.