To delete or not - 2014 Ram 2500 6.7L

[Holdmybeer]

Berg,
Turning wrenches yourself is a good bet but you will need a tune or old school tuner to get your engine light off.
There are some "race" tuners you can find used that will help. Not trying to get huge power but just help with reliability. Your transmission is the weak link so just adding 40hp tow tune and not having limp mode anymore sounds like your best bet. No black smoke, no crazy smell, and not really louder than stock, just keep your muffler or add a performance one.

In Ohio dealers are still taking deleted truck on trade. The city dealers aren't but the rural dealerships are paying good money for them. Otherwise, FB marketplace will sell it quickly if you need to later in life. My deleted duramax sold in 24hrs for top dollar.