I ditched it but did it together with a friend today and he got everything recorded, from getting it, to glitching it inside to insuring it, so just keep an eye out for that.
All I suggest is to do this with a 2nd, new fresh character (you share your money between chars) and store the Cargobob inside an empty garage so it doesn't matter if it glitches out or not.
Basically have 2 chars, 1 legit garage char and 1 troll garage char (Cargobob).
Now it slowly started to glitch out:
Mechanic Call Dialogue Proof