He has a group of subscribers who have opted-into receiving his emails. He is not sending email to people who do not want to be quasi-spammed. He has only 350

He has a group of subscribers who have opted-into receiving his emails. He is not sending email to people who do not want to be quasi-spammed. He has only 3500 emails to send. Setting up such a simple system might take an hour or two, not a "few hundred hours".