Once you have your table in clay, to extract business emails here's a video on how to set up a waterfall in Clay to maximize coverage and minimize the amount of credits you spend by combining providers- https://www.clay.com/learn/find-work-emails-from-linkedin
- credits required: from sales nav 20k, get business emails at least 3 credit per email, 60k... so not less than 80k
-is going to be very accurate given the double check with debounce
-select the work email waterfall and its not going to search personal emails, there is another workflow for personal emails.
-The time required will depend on different factors... I can't provide an estimate