You get what you pay for and have to be willing to pay for what you want. As for the SS versus tractor cost, you have to look at what you're getting. A relatively small SS (new) will probably cost more than a somewhat comparable tractor. A 60-75 hp SS will probably cost more than a 40-50 hp tractor.
A tractor will probably have greater ground clearance but, if you're steeple-chasing with it, or mud-bogging, you're using the wrong equipment for the wrong thing anyway.
Implements cost will be fairly comparable since the attachment of them is the key difference - three-point versus loader-quick-mount. And consider that all of the SS implements attach up front so you don't have the chiropractor bill to add into the mix. Some of the key reasons I got rid of my Beaver included: I was tired of turning around to plow snow; the snow blade had a 12" moldboard and couldn't push a lot of snow; the blade would only lift a couple of feet - stacking was not really possible; the loader was agonizingly slow (by comparison), had a bucket well narrower than the wheel-width, the bucket wouldn't hold enough snow (I considered building a larger bucket but the loader arms wouldn't have liked that); took a lot of room to turn around; had long cycle times (slow to stop, shift, reverse, stop, shift), along with a wide sweep of the front end to accommodate the turning - and a wide sweep pushing either forward or reverse; it couldn't 'dig itself out' if I got it stuck (the bucket didn't have enough range-of-motion, relative to the need - to push/pull me around)...and I could go on.
I'm obviously sold on the SS.
BTW, more on ground clearance. Unless you're working in pure, bottomless mud, or on top of non-supporting snow, ground clearance is not a big problem. Either can get stuck. Tracks can make a difference on 'floating' either.