Is the cost of living in Wassenaar high?

We asked people how much they someone comfortably live on in Wassenaar, they wrote...

"Yes, the cost of living in Wassenaar is high. It is regarded as one of the most expensive Dutch towns, due to its location near The Hague and the high-income earners living there," remarked another expat in Wassenaar, Netherlands.

Other Questions:

What should I pack when moving to Wassenaar?
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As a foreigner living in Wassenaar, will I have access to public healthcare? What is it like?
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Is the cost of living in Wassenaar high?

If you live in Wassenaar, newcomers to Wassenaar would love to hear your answer to this question.