I had six Ferraris as well as a 6.0 Diablo, among others. All were reliable if they were properly sorted, not cheap to maintain. I've had new ones and used ones. As indicated above, if they sit they have problems. The infamous "Italian tune up" does work--but isn't a substitute for proper maintenance. I used an old school dealer that is no longer what it was when I was active. They knew the cars, not just parts changers. There were some good independents too, the Lambo was a beast, but the guy who looked after it knew the cars intimately, and could source what I needed without killing me on parts.
The biggest hit I took was on a new GT2 set up as a club sport. I'm told they are now valuable.
I never did this to make money but never got hurt on the Italian cars. They were a lot of fun with the gated shifter. I don't like paddle shifters, but I'm old school. Thus, talking to people on a Morgan board.
