Exploring Clay for Updating CRM Employee Count: Need Data and Time Estimates

Hi! Exploring the potential of building a recurring table to update my CRM's employee count field using Clay rather than our existing data providers. Where can I find data / who can I speak to to get an idea of how much time this would take for the amount of accounts we have in our database? EDIT: this would be a recurring process, not a one-time enrichment and meant to continuously update CRM account records at a regular interval.