The problem there is if you buy something that is out of powertrain warranty and there is a mechanical issue there aren’t any 20 or 50 dollar parts on most diesels. More like 200-1000 dollar parts and the labor is big $$$ too since there are fewer people to work on them.
If you got it that cheap then either sell it and get rid of it or set it up as a dump truck or tow rig and sell it. Personally I think you will have more luck with a flat deck tow body.