I transitioned from a Cessna 172 into a 1989 Mooney M20M Bravo, but I had another 50 hours in the right seat in my friend @John Orcutt Rocket. I also spent many hours with a knowledgeable instructor who trained me appropriately in the Bravo.
I eased into the plane and gradually increased my cross country flight distance over a year or so.
I am approaching 700 hours and really enjoy the plane.
It ain't cheap tho.
I the last 3 years, I have spent over 125K ++++ on MOH, landing gear actuator, turbo OH, controller OH, etc etc. The list goes on and on. Oil changes/samples every 25 hrs. You name it, I bought it. My insurance hovers around+/- 3800/yr on a 150K hull value. I am not concerned with insuring 200-250K hull values. I'll self insure. That's another reason I like the Mooney M20M.
Additionally, safety is very important to me and I do not mind spending money on deferred maintenance.
Planes are a money pit, but it affords me the ability to travel back and forth to Ohio and Louisiana from Tucson when I want to (weather permitting).
Flying is a challenging, rewarding and fun hobby for me. That's why I love it.
@donkayeis correct, plan on 40K a year