Blueskies wrote:

I know a local CFI that pretty much stopped because to insure the
Piper 160 and continue was going to be about $5000 a
year...

Yep. About 3 years ago, insurance rates for commercial operations
nearly doubled because of a shake up in underwriters. That put most
single plane/single instructor operations out of business. I remember
it because I was on a hiatus from my real job and was planning on
getting the CFI rating and providing training in my own plane. The
insurance issue killed that idea.

John Galban=====N4BQ (PA28-180)