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.