My road situation is similar to yours, a 1000' elevation gain over a 2 mile road with either ditches or dropoffs all the way down. I had a Kubota
L3830 with the same blower setup you're looking at, along with a Landpride 3584 rearblade w/guage wheel on the back. After using this setup for three years here are some of the issues I had:
1) My "road" (I use the term loosely) consist of dirt, rock (3/4" to 3" minus), and ruts. Even with the blower skids jacked up several inches I was constantly popping shear pins. Blowers hate rocks and my road grows big ones. The constant freeze thaw cycle pushes them to the surface.
2) Blowers are SLOW. I found about 2 mph was the best I could do under most conditions. I found the rear blade to be much faster (4-5 mph) and it tolerated the rocks much better.
3) Even with chains on the front wheels, the blower doesn't allow the tractor to turn. Those skids up front turn the tractor into a sled that only want to go one way - straight ahead.
4) Forget trying to attack a berm or drift from any direction but straight on. Otherwise, the blower will suck you into the berm everytime. It makes for slow going if you're trying to clear 2 miles of mountain road.
5) My 3830 was to light and underpowered for the task. Even with chains on the rear, if I offset or angled the rear blade, I was constantly fighting rear wheel slippage and getting sucked off the road. I eventually took to driving backwards down the mountain using the rear blade to bulldoze the snow off the road. I then had to drive back to the top of the hill and make another pass as the tractor did not have the traction or the power to make an uphill plow run.
Recently, I traded the whole setup in on a larger tractor with more power and weight (Kubota
M5040), filled the fronts and rears with Rimguard, diamond logging chains all around, and put an AnBo 8' dozer blade on the QA loader. Man, what a difference! I can easily do in two hours now what took me 8 hours with the 3830. Don't get me wrong, the Kubota blower is a beast. Mine took a beating and never clogged. I think I could have run wet concrete through it without clogging it. But I've come to the conclusion blowers are best suited to city/suburb sidewalks, driveways, and parking lots.
Oh, and my agreement with my spouse was "I" would keep the road open for her no matter what.