No, the previous poster had said it's nearly impossible to trade for exceptional young arms and I was just using as reference that the Yankees in 2018 (3 years ago) acquired just that for a reserve outfielder to boot. I never said it was an overnight process, just that you can acquire and/ or develop a stable of possible aces to populate your starting rotation.
The percentage of payroll that a free agent ace will cost is too great a risk for the Twins. Heck, even the vaunted Yankees had to play a single-game playoff this year, started their $36 million-dollar-man, and still lost. No matter how good you are, the post season is still kind of a crap shoot. I think it was Roger who posted earlier that a rotation of #2's and #3's can carry you a long way both during the season and into the post season, and be affordable year over year. And yes, you better have a decent bullpen.