I've been following this post, curious is your fuel winterize? In upstate New York area average winter days 18ーF and down to -5 at night my tractor starts right up sitting outside with two hits of the glow plug of courses different manufacturers but any modern diesel tractor should start quite easily. Try some power service in your fuel the white bottle I'm sure you will find that tractor will start right up with the fuel additive helps boost fuel's effectiveness in the winter not to mention it adds lubrication for your injector pump. One other quick thing your battery should have a minimum of 800 cold cranking amps for quick starts in cold weather, and also using synthetic oil helps the engine turn just some things to try. I posted a video after a debate in the new Holland forms on cold starting procedures it's still listed under new videos check it out I'm going to do another one when it's -5ー to show how easy a modern fuel injected tractor starts when properly prepared for winter no block heaters or other support. Take care