If, and it's a BIG if, you could emotionally let go of the responsibility of tying your own leaders I would venture to guess that a dime per tie would be about right. And since one tie (or more) per minute is very achievable that could make them about $6 an hour. And since you are talking about paying someone under-the-table that's not bad at all.
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Get Bent Tackle whōre. Just added spinner section, where you can special order to your hearts content!