I'm about 60mi NW of Columbus out by Bellefontaine. I did the washer fluid in the rear tires of my B3200. No issues at all with freezing up this winter and it stays in an unheated garage. I got the fluid at Rural King, winter blend rated to -20F and paid around 1.20/gal since I bought around 55 gallons to fill the tires and then have some on hand for the winter. I did the job myself using a small pump and hose that fit the pump and over the valve stem. You can buy a valve that will allow you to purge the air in the tire without letting the fluid drain out of the hose. All in all it took me around 2 hrs to do both tires. I have ag tires so it was difficult to collapse the side wall any to speed up the process.
I had considered Rim Guard but when I did it 3 yrs ago, local dealers / mobile tire repair companies were not carrying it up here. I would have had to trailer my B up to a dealer around Lima and I didn't have the equipment to do that. Add in the cost of getting the tractor towed up to Lima, filled and towed back, I was close to 800 bucks. All in for the washer fluid, I was around 100 bucks.
If you do end up using washer fluid, buy that purge valve and wear gloves. The alcohol in that fluid will strip your hands dry and stain them a nice blue. Also dump your fluid in a 5gal bucket. It goes in pretty quick at the start and you want to keep that bucket full so the pump does not draw air in. If I remember, each tire took around 26gal. Fill to the point where you have the valve stem up top and no fluid runs out. At that point, replace the valve and bring the tire pressure back up. Also have a jack under the rear end so when you pull the valve stem, you can have the weight of the tractor help collapse the rear tire and suck in more fluid.