Find a later build date like 2013ish and newer. The 2011's gave ford a very bad name with the failure rates:
poor material used in bearings for turbo, glow plugs braking and eating a cylinder, sensors and dpf/eef system failures, lifter/valve mechanical failures eating the engine, coolant system leaks esp with radiators, The newer series of 6.7L are making big waves in reliability. but, the 2011's were not a good year plain and simple. Late 2012's and up had some changes and it seemed by 2013/2014 they had it all figured out.
Let me help with the details-
-turbo bearing failures largely attributed to early tuning, and being horrifically overspend. Yes, they fail in stock form but seldom.
-glow plugs never were an issue. The problem was a limited number of trucks in a specific vin range that had subpar heat treating on the valves which led to them cracking and destroying the motor. First step of troubleshooting was to pull the glow if and see if the tip was gone "ding ding" guess what, the bits of valve took the tip off.
-emission related sensors causing the truck to shut down was corrected by an updated flash that simply put the truck in limp mode instead of disabling the engine.
-the lifters are the same now as they were then. Higher miles and engine hours show the failures first, hence why the oldest trucks may start having problems.
-same story with the rads, higher miles equals more failures. 11-16 rads are a the same. Check body mounts for excessive movement before replacing the rad.
Don't broad brush 2011 as a bad year. Not the case at all.