Mike, you've already been told that it is totally impractical to use that truck in residential service. Maybe not impossible, but then again, very little is impossible, just real hard to do.
Set your own hours? Mother Nature is going to do that for you and you will have no choice!
If you're so set on plowing with it you would be way better off to work for a municipality until you get a clue of what is involved,
So what if you have a bulletproof contract, you won't have the customer after you tear the place up. Incidentally, ground pressure is equal to tire pressure, which is probably about 100 PSI on your rig. Don;t bother debating that, the agricultural people have determined that doing studies on soil compaction with tractors, same gravity applies to both.
You WILL be plowing with a load or you WILL be stuck! I don;t care how good your driver is, once you get a little snow under those tandems you won't have traction. Have you ever driven that rig in snow? From what you're trying to tell us it seems apparent you have not.
I'm setting up a single axle, 5 yd dump with a big plow, but it will get used only on private streets and large lots, no way is it suitable for residential work, too big, too clumsy and too slow.