If a potential customer seems welded to their Apple network, I encourage them to call Apple support when they have issues. I try to fade away as gently and quickly as possible. This customer is convinced that Apple is the best,  it is "easy" and when I can't tame something as "easy" as an Apple network, I must not know what I'm doing or I'm just trying to make a sale, replacing their perfect gear with something else. Allowing them to stay with Apple networking is all pain and no gain for me. In the end, I may make a sale when it finally becomes clear that Apple networking is not a great idea.

Over the years I've noticed that when a person is struggling with PC technology, they get mad because PC is unnecessarily "hard". If they switch to Apple, because Apple is "easy," and they still fail, they never get mad at Apple, but quietly accept the failure as their own.