I vote for ATV to plow the driveway with the tow behind mower for cutting the grass..

how often will you REALLY use a skidsteer? and on top of that purchase you still have to cut the lawn

 

I've owned skid loaders,backhoes and dumptrucks for 33 years now and made my living doing it. By the time you rent the stuff and take twice or three times as much time doing it your better off hiring someone good and fair to do the job. I've seen it alot, I rent my equipment to a few people and could have done the job in a fourth the time and a better job than they did.
The slab will probably rip out with forks on the machine, probably not any or much steel in it. When I go on a little job like this I have either my skid loader or 436 cat hoe and my tandem dump truck. Two or three hours later I'm loaded and done with a job like this.
Just my opinion take or leave it.

Skidloader don't mow very good, I have a brush hog for mine and they tear the yard up bad.

 

save yourself some money and get a 2wd tractor, use chains in the snow and mud, I have a cub cadet 7232 with front end loader and a woods backhoe with subframe, Iv'e got 8500 in the whole setup. We had a couple big snows, 27+ inches of heavy stuff and I had no problems at all, if I went off a ledge of a driveway I could use the backhoe to get me out, only happened once in about 80 hours of plowing,. You can either run a 60" belly mower or 3pt mower with most utility tractors. I even use mine for handking the fire wood cutting and use the backhoe for lifting the heavy logs to the splitter.