I don't think you should be encouraging Doris to take the job, Stuart. Even you must see from her post that the terms she is being offered are ridiculous. What percentage of households sign up for an appointment, maybe 1-2% if she's lucky? That means she has to visit at least 3600 households to get paid her £100. At an average of 3 minutes per house, it would take her 10,800 minutes or 180 hours to do the job. That's 180 hours of work for £100. Mmmmm, I don't think that's the minimum wage, even in the developing world.

Let's face it, most reputable building companies are able to get work through recommendation, not by employing door to door salespeople on ridiculous terms. As you say, it doesn't necessarily mean the people going door to door or con artists, however the companies employing them maybe pretty shady.