Good information. I believe those are for hobby multirotors. Commercial drone flying is more expensive. I use Verifly for commercial flying, because I purchase it by the hour and only purchase when I need it. It's like $10 per hour for $1M in coverage, if I recall correctly. You use your phone app to start and stop the insurance timer, and it covers 1/4 mile radius from the GPS location of the phone when you start it. I believe those parameters are adjustable, which also affects cost.