Recycling Cold Call List - Effective?

[Justin Yurong]

Hi all. I'm a new wholesaler and I'm curious to hear other people's experiences recycling their cold call list. I created a list of distressed property owners of about 18.5k records. My VA has called about 11k of these records in about 2.5 weeks so far with decent leads that I've put into my pipeline.

She has instructions to recycle the list and continue calling people until she gets a "do not call me again" response from each person. I am wondering whether or not I should create and skiptrace a whole new list once she calls that current list once, or if I should just have her continue calling the same list. 

Skiptracing can be costly and I want to make sure I get my money's worth out of each list but I also want to make sure that I'm not wasting anyone's by calling the same people who never respond. Any feedback or stories of your personal experiences help. I just want to feel like I'm moving in the right direction.