I ride year round and put around 30,000km on a Z750s a few years ago. Not the machine i would recommend but you use what you have. The biggest problem i see is the HP factor. You will need good soft rubber to keep that 100+ hooked up. A couple of lbs of air less might be helpful but it will affect handling. Frame sliders recommended at minimal and a set of engine guard/rollbars will save even more plastics. The salt can be washed and a good coating of green rust check between will keep most of the rusties off.
I don't own a car and I use a KLR for winter duty. Lack of HP and knobbier lower pressure tires are my best defense. And it is a beater. It keeps the winter damage off my more valued equipment.
R1150 GSA, KLR650, K75s(x3), RD350, PS250 (Big Ruckus) R65
If i still had every dollar I spent on motorbikes I would be a richer man but a poorer person.