Prayers for your wife. We just celebrated one year of my father having a double transplant (liver and kidney). It's given him a new life. Your wife's time will come. :)
I towed that same weight for 6k miles across the desert southwest. Didn't hardly know we had the trailer with us. Plenty, plenty of truck for that weight. Now I tow about 7500 pounds, and it still does a great job, but I know it's there. ;)
Isn't 2011 the first model year? If so, there were a few issues to educate yourself on. I don't know much about them, but I would research closely.