I need your honest opinion

I think people have done a great job of going over the financial and emotional aspect of all this so I will take a different direction on this and even if you are planning to sell it, it would probably give you peace of mind if you could get to the bottom of the electrical issue.

I'm curious about something you mentioned. You said you had replaced the voltage regulator and then you had a "smoke in the cockpit" incident. I had a failed voltage regulator on my car and I replaced it with one made in China from my local parts store. Afterwards, I took it out for a drive and noticed my electric fan was louder than usual (it is obnoxious on a good day) and when I scanned my voltage meter ( I no longer have the factory ammeter as that seems a little dangerous in these cars ) I noticed it was reading just under 18 volts! I purchased another voltage regulator from NAPA ( NAPA typically has higher quality parts here in the US) and it also read in the 17 volt range! During all this, the electronic control unit for my aftermarket air conditioning fried. Long story short, there is a guy on this forum who sells original OEM voltage regulators, I purchased one from him and that fixed the over-voltage problems I had. If you have a voltage meter for testing, you may want to verify it is regulating in the 13-14 volt range. Also, I would take another look under the dash for melted insulation on the wires as it probably didn't fix itself.

I wish you best with your decision.