I don't believe I've ever seen offroad gas around my AO, or I would have bought some. Offroad diesel is already not that common. I have to drive 45 min for it. Ethanol free gas is a lot more common.
I do live in corn and soy country, probably no more than 20 miles from any given direction where one can get dyed off road fuels. Also about every gas station will have some sort of ethanol free gasoline for sale.
I only mow 15k sq feet of turf, on a rainy year when I mow twice a week in May and June, I might use 8 gallons of fuel between my rider and push mower. Normally I around 5 gallons. The 14hp Kawasaki engine in my John Deere rider sips the fuel.
I almost bought an 15 acre acreage when I was looking for a new residence, I didn't because it needed way too much money thrown at it to make it habitable. If I would of bought it I would of gotten a 100 gallon fuel tank and had the Coop deliver off road fuel for on acreage use.