Not read this thread for a while, but often think of and admire the track machines. Our Bryce profi supreme will be six years old this summer. We did intend trying to do a lot More fencing work, we enjoy it and have the gear. However circumstances have made things as they are and today was our first day fencing this year, I work with my wife and we both enjoy it. She's the tractor driver and I operate the machine. Yes it doubles the labour costs of a purpose built machine, but I'm quite happy that she can be in a cab all weathers as due to a non fencing injury, the colder spells are painful for her.
Also on Monday I was using the tractor to power our wood chipper on a job. So currently on those counts a tractor is the only real solution for us, plus we would still need it to tow a plant trailer or get a hgv.