To be honest I don't see any trucks smaller than 1/2 ton pickups with plows on them around here. I would imagine that one would need at least a six cylinder engine to generate enough horsepower & torque to plow snow. 4 wheel drive is a must and weight in the box to increase traction and the kinetic energy needed to push a 300lb. plow + snow.

If you already own a vehicle for your commute, maybe look into an ATV to do your plow job, instead of a pickup
That might be the more frugal alternative, and will fit in your storage space.