joeax means managing / coordinating remote workers is often harder than on-site workers because of different time zones and conference software problems.
That is true there is a cost to managing remote workers. But after 1 or 2 workers the cost diminishes as there are established practices in place to ensure productivity: Slack, Skype or appear.in, join.me, Google Hangouts.
For more tips on managing remote workers, check out remotive.io (disclaimer: I am not affiliated with them at all)
