One more thing. StayCool, I still think you will cross the finish line. But, if you don't as long as you keep going and don't quit this lifestyle then it won't matter. It will just be a piece of your success story when you finally reach your goal.
I am taking the same approach with the marathon. I almost went switched it to the 1/2 but I decided I will give it my best and if I don't finish at least I tried and I am not a couch potato anymore. I will eventually finish a marathon, even if it isn't this one. But I still think I'll finish this one.