Australia does have a public RTK network, which is free to access - you only have to ask. But you need internet access, and RTK only works is you are within 20

Australia does have a public RTK network, which is free to access - you only have to ask. But you need internet access, and RTK only works is you are within 20km or so of the base station. As other have said can do a local install. A pair of RTK receivers is only $500. But you need a connection between the base station and the tractor. These farms are pretty flat so perhaps perhaps technically it's not so difficult with LORA. But these are farmers, not hackers, and perhaps it has to talk to the tractor, and perhaps the tractor is made by John Deer. It all gets very hard very quickly. In the mean time SBAS was a off the shelf solution the dealer could sell to everyone because it worked everywhere in the country. Until it didn't.