Begin with a tuned gun. Giacamo, Braker, Crrenwelge, and others can bgin your shooting career with a TM1 and you can expect it to last thruout the season. I shoot a lot and that equals 5000 a year out of a single bbl Perazzi as does my son-in-law with his TM1. All we do is occasionlly watch the spring tension and usually change it once a year. Your Perazzi will not break. Just an annual check and a hammer spring and you will shoot trouble free.
If you plan on shooting 10 thou a year, then I have a diffeent answer for you. But as a likely casual and ATA shooter, just a wary eye on the parts and youare good to go.
And there is always parts onthe ATA trap range if something does let go. Unlikely tho.
I bought my current one 3 years ago. Nothing has broken except a firing pin in '09, which I replaced and a leaf hammer spring at the grand last year. I finished the event with a back-up trigger and Giacomo's replaced the spring in about 3 minutes. Those are the weakest points on a TM-1 in my experience.