I agree with whats been said about new estates.
In my town there are a few new estates, I have a handful on each one . however most of mine are financially well off or semi/ retired
But, there is one newish estate  that I only have one house , (she is retired )   I have had about 12  others on this estate , and they all kept skipping cleans  , forgeting to leave gate open , or failing to grasp the concept of actually paying me .
A lot of  new window cleaners target these estates like they are the holy grail.    they couldnt be further from the truth.