Freedom Machine blogs can work very well for coaches if you want to create passive-income products that supplement your active coaching practice. The biggest hurdle you may face, especially if you've been coaching a long time, is going back to square one and identifying the basic need and want of your audience, apart from your coaching process and the unique language you use with your clients.
The central idea of your Freedom Machine blog will be to write to visitors who don't yet understand your coaching process but are searching for help on your topic.