Seeing as your car in it's current state is worth feck all, it's not worth selling it as you would probably end up having to pay to get it taken away.
Why not just buy a decent enough car to do your Scotland trips in, and put the Golf up somewhere until you get the time and the money to build it into the show stopping, fire breathing monster as planned? It would need to be taken off the road at some point in order to carry out the transformation, meaning you would need to buy a second car at some point, so why not just buy the second car now?
If your dreams were ever to become reality, then this would be the sensible thing to do, but like so many others, I don't think that this is ever going to happen. I think that deep down you know it will never happen as well, but we all look forward to you proving us all wrong.