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I'd *love* to have the hydrostatic drive but replacing a friction disc every few years really isn't a big deal at all - can have it done in ~15 minutes and would be completed as a part of the routine maintenance that would go along with any snow blower.
After discussing the models and features with the wife we're actually leaning towards the 30" Platinum from Ariens. It's expensive, sure, but with proper maintenance [which I have no issues doing, just like I don't mind changing my oil or cleaning my guns] it should last 15+ years easily.
I've had my craftsman a while, and I haven't had to replace the friction disk yet. I know you're looking for an Ariens, but I figure if I haven't had to, you might not have so much trouble.
My drive's probably not as long as yours, but I end up running to different retired peoples houses, and my parents, and do their drives. So it does get a bit of use.
I also added an hour meter to it, just to get an idea of usage.
It runs when it senses spark.
Some people use them for maintenance. I do my maintenance around Halloween. Oil change, lube the chute joint (where it rotates) (low temp grease), test start, etc.