Hey Col, you're rather like Inspector Morse!
I didn't see the sense in any of the stated either.
One thing which his striking me in the face like a soggy Trout, is the buggy project car. Talking from my own point of view, when ever I take on any large projects (i.e. this example is not specific to RC) the motivation and enthusiasm starts off sky high, but eventually plummets to sub-zero taking the whole enthusiasm away from anything to do with it.
So, drop the project (I know you already have), declare to yourself that it was a mistake and continue to enjoy the sport using the choices already offered and stop wondering how to make your own, maybe use your mind to improve on them instead.
Oh, and ofcause burn the 2D cars - film it for You-tube, and buy an off-roader!!!!