A couple of years before I left Virginia, I built a prototype 30" wide manual snow pusher to see whether it would be faster than shoveling my 40'x14' paved driveway. It's really ugly and built from random wood scraps, but it worked well and my former neighbor still uses it. The snow depth it can handle depends on your strength & traction, moisture in the snow, slope, and how far you need to push. We both found that it was pretty handy for six inches or less accumulation and cut our total task time in half. If I hadn't moved to Florida I would have built a "real" one. You Not-too-Northeners might want to try something similar.
The prototype consisted of a plywood blade, backed by a horizontal 2x4 with a perpendicular mitered 2x4 on top of it. The handle is a thin strip of mahogany flooring bolted to both 2x4s. The final design should have angled braces for the handle as well.
Here's a photo my ex-neighbor sent today, in its fifth year of use.