I have never hired one, but I work as a professional organizer. I charge $15 an hour, but I am probably on the low range. I live pretty far from any major cities so my clients probably wouldn't pay more than that, but most charge around $25 an hour or more. But I would say look up the NAPO website and find some in your area and give them a call.
Organizing is so much easier with someone else, even if it is just a friend.
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