I've actually got 3 old ladies at £3 each, but do them as one job and it takes ten minutes. They'll all happily pay for each other anyway.
Wouldn't want to call back for £3!
Two of them always ask me how much it is, even though it's been the same for about 2 or 3 years!
Still, I suppose I could put them up and they wouldn't notice.
I also got a once a month residential home at £3.50 a flat, for 3 big windows.
As a complete job it's usually around the £70 mark, and it's 2 hours(ish).
Sometimes these sort of places can be some of your best jobs....
Roger.(still got my marbles, just)