Why you're playing chicken
Truckers in the US are allowed to drive about 11 hours a day, which works out to about 600 miles. Actually, truckers in Europe are actually allowed to drive even less because of the research which shows that your driving abilities and skill start to fall off dramatically after about 8-9 hours on the road.
Your current plan has you driving 50% more per day than what American professional drivers are allowed to drive, and basically double that 8-9 hour guideline for those first two day.
Yes, you have dialed back the most extremely insane of your plans, and we appreciate that. However, you are still laying out a plan that is simply put, dangerous to yourself and others on the road. Saying you'll be safe while doing such a drive is really no different than saying you plan to be safe while driving drunk. If you think that's harsh, well, sometimes reality is.
Like I said, we can't stop you from pushing yourself way beyond what has been shown time and again to be safe, but we do ask that you ask yourself why you think you aren't affected by those biological factors and why you think you can safely do vastly more than what professional drivers are allowed to do.