I also agree laying out $60k on a truck should provide one with reliability and dependability.
But the ship has sailed on that one, and you have what you have at this point.
You either decide to live with your present truck, perhaps finding the problem was poor maintenance (cured by a new mechanic?), or you dump it.
Living with it seems beyond both your financial means, and your desire to put up with it, so your choices are very limited, especially since your other pursuits don't allow other possibilities.
Sometimes one just does what he can, then cuts his losses. Only you can decide if RVing in a T/C is something you can continue to pursue.
Since by your own reports, your time is limited, perhaps just working at your profession would provide more satisfaction, and less frustration for you.
I know you know this, and mentioned it only in jest, but "encouraging" theft of your vehicle is unlawful, and could subject you to arrest and imprisonment, plus liability for whatever mishap the vehicle would get into.
Here in the States, people have gone to jail for allowing their vehicles to be stolen (by UN-intentionally leaving keys in a vehicle) when that vehicle later was 1) Used in a crime, or 2)harmed another individual when operated by the thief, or someone he sold it to, so I do not recommend this disposal method (and that's ignoring the insurance-fraud aspect of the crime).