Two feet of snow will make you say:" Whooeee! Thats too much snow! I think i'll just sit it out, and wait for Spring!"
And, you will make multiple passes, no matter how much or how little the amount of snow! And, i can say--if you are the football full-back type, you will get your exercise, but if you are the "Casper Miquiletoast" type, and after the exitement of your new machine gets old, you will definitely decide that snow tires or chains for the car are much better than trying to open the driveway more than two narrow paths. Or the front walk!
Yeah, i had all of those things! The big 12 h.p. blower, the electric start 2 cycle Toro, the electric powered hand push, and it all boiled down to a big snow scoop, and an out and back pattern to get the snow off the walk! The car and truck sit out all year. And look as good as the neighbors' cars that get put away every night.
Oh, and where are you going to go, in 2 feet of snow? HMMM?

go to this forum
OPEonthenet. They talk about snow blowers all the time.

Two threads from that forum, a little bit a reading though.

Discussion 1

Discussion 2

You may want to introduce yourself to the neighbors and tell them this is your first year of snow and ask them what they use.

Just some suggestions.

I have a similar sized drive, but mine's 3 cars wide with no public sidewalk. I have considerably bigger machines (605 BCS with 28 inch blower and 850 BCS with 60 inch blade), but that's 'cause I like toys. You should be alright with the blower you're considering, either in 18 inch or 21 inch. "MOST" years a machine like that will do.

You gotta know the machine's limitations. I usually go out and blow or blade off my snow every 12 or so inches in big snows. You can just go out at 6 inches deep, blow it off, and do it again when it get 6 inches deep again. If you let it pile up past that, you'll be doing a lot of cussing as you try to remove it. I've seen guys physically throw little blowers after getting frustrated that the "little piece of junk don't work" in 15 inch snows.

I definitely would not recommend letting it pile up like rusty mentioned. You'll end up with a dangerously slippery ice sheet after the snow packs down, gets a 40 degree day, and freezes again.

Maybe I'm behind the times, but I'd be concerned about a single stage machine in any climate where your snow can be heavy and wet. With a single stage machine, if you fall behind the storm you might find it all but impossible to catch up.

It may be too late to get a bargain, but I'd recommend buying a more capable two stage machine used than a new single stage machine. Check Craigslist and see if you can find someone who's stepping up to a larger machine, moving or something.

Apart from single versus two stage, another thing to look for is a machine with panel-mounted controls. The ability to adjust the direction and height of the throw without stopping is a huge time saver, especially if you're throwing snow in tight quarters.