5018 - 18 + 5018 -11 Nighmare

[MarkyMark]

Help !!!
Hope some of you were dealing with similar problem (and are still in biz) . My 2011 prostar is on going through turbos like it was candy . I'm currently on 5th turbo this year only , replaced egr cooler , baked the dpf , rebuilt the head and cams , changed the radiator (was cracked) 7th injector and nothing helps ! Still after about 1-2 k miles after turbo replacement calibration and forced regen it throws 5018 -18 and 5018 - 11 , and in another 3-5 k turbo starts leaking despite the weekly forced regens . At this rate i'm pretty sure i won't be able to stay afloat and by the end of the year will go out of business, any help appreciated