My personal experience: I purchased my Mooney M20K 231 while I was training for my PPL. I was covered as a student pilot with 0 hours in a Mooney and only 2 hrs RG/HP for $5,400. Of course I was required to have a PPL and 15 hrs of transition training before I could be covered solo and 35 Mooney PIC hrs before passengers would be covered. That coverage started 3/27/2020.
I am currently shopping for insurance and currently I have 130 total hours and a little less than 90 hours in my Mooney. The quotes I have received so far have been between $5,700 and $7,500 and most companies have refused to quote at all. I have been told that Mooney insurance has increased drastically but was not given a reason. I was naively hoping that my insurance would go down once I got my PPL and proved that I could actually fly the airplane.
I'm also naively hoping that once I get my IR it will go down but I'm the first to admit that I tend to have too much of a positive outlook.
Dewayne