Still dead in the water..

This thing....grrrr. Seems even with a second new alternator, the thing is dead. Having had 2 batteries and 2 alternators installed, it will still not stay running for more than 2 seconds once disconnected from a charge. Apparently there is some sort of charging issue, be it a bad wire somewhere or the computer is toast, something. All I know is I cannot afford to be paying a mechanic lord knows how much for diagnostics or even worse having to repace the wiring harness at a fortune or the entire computer system.

So I guess the question is, do I keep and do as I can over time, or do I say screw it, get rid of it and take out a bigger loan and get a truck with longer payments.? I hate paying for something that is not even usable/drivable at this point.. Unfortunately I still owe a great deal of money on it, and will never get back what I need to cover on its loan.So again, either it sits useless for quite awhile, or I bite the bullet and go all in on a newer rig and longer payments. Sometimes I really hate adulting...lol.!