You have to wonder about some of these repair facilities. You get a good honest diesel mechanic and even if a head bolt breaks, a good mechanic will know how to get them out.
Kind of strange that once it got into the shop they found a bad turbo, fuel pump quit or started leaking. Something just does not sound right. The thing is that most places we are at their mercy because most places will not even allow a owner to go back to where they are repairing the coach. Liability situations will not allow most owners to go to the repair spot.
But I agree that you can get a bad engine on any brand. If it is mechanical, it can break. But these statements saying that it broke because it was eleven years old is pure bunk.. Those engines will last for ever if taken care off. Most motor home engines will last at least 500K miles before they need an over haul.