VW,s have a pretty serious following, especially Campervans. There are lots of companies who treat the chassis,s and bodywork for rust. Its a well proven route. As for engines there are some serious upgrades for VW based cars, so power units are there if you want a powerful beast.
But like you Peter I too love the look of the Chesil ( Porche 356 ) Speedster.
However, a plane could be built in a garage. I rebuilt my Minimax in mine after it had been crashed ( not by me ). So it can be done.
G-BYBW001 by
denniswpearce, on Flickr
So we wait to find out now