Money, Max. Money.
Cirrus Training facilities cater well to owners, but there are a *lot* of people who rent. The SR-20s around here go for $230-250 an hour wet, and the SR-22s go for around $260-280 dry. Instruction is $100 an hour on top of that. I don't imagine they're renting out an SR-22 to a <100TT pilot unless that pilot is carrying some serious insurance, but I don't know that for sure.
It's do-able. The facility is top-notch, it is run by some excellent instructors, and the Cirrus program is, I have to admit, pretty comprehensive from nwhat I've been able to gather. I haven't paid for any of the courses, but I've seen the catalog and they do what I suspect is a pretty good job mating up the concept of flying a Cirrus with the rest of flight training.
It's just a different way to do things.