If I ever speak to someone about a quote or someone calls me up with that attitude I would just say sorry I haven't got the time to do it,how it starts is how it finishes usually badly. I would end up resenting doing it for her, my approach is its not the time it takes but the end result. I've had a few over the years like that but I can honestly say I don't now,the only thing like that I'll tollorate is going on the day that suits sometimes and that has to fit in with me also,cleaning on certain days and times would only be on £50 + jobs and when on the area. That is the kind of job you would take on if desperate for the work.