I had one just last week, I had priced this big house with Georgian windows at £50, she said will you do the insides too for £100, I reluctantly agreed, of course the insides took me three times as long as the outside with WFP. I decided that there was no way I would do the insides again for that price, I was about to tell her this when she stuck a cheque in my hand for £130. It took me 6 hours in total.
I may be an old git, but I still have a lot to learn.