Whatever a car is worth to you means nothing. It's what it is worth to someone else. I understand you may have spent money on the car but modifying cars you will NEVER make your money back. Not even close.
TBH you are still at least 3k shy of what someone would be looking at paying.
If you wanted to maximise your profit Part the aftermarket/Engine parts that are fine out and sell as rolling shell.
But seriously just throw it in storage till you fix it. Good luck.