If one was to spend $50,000 on a Cougar, could they make it an Audi R8 rivaling masterpiece? Other than being a Cougar, I think so. They could transplant an EcoBoosted V6 into it. Alternatively, if we are being hypothetical and insane, an SVT Cobra engine; which based on a complex flow chart which I amazingly did not completely make up, would bolt right in. Then, they could take the AWD drivetrain that apprantly did exist on the original Ford Mondeo (that the Cougar is sort of based on) and BAM! You have an AWD Cougar with 430 BHP.
Assuming you find all of these pieces in junkyards (though, you would have to cross oceans in order to actually get said pieces, so transport would factor in as well), one could probably make an Audi R8 slayer for well under $50,000. Based on these facts (or wild-ass guesses, I suppose), Audi is charging thoroughly outrageous prices for the R8.
(Don't mind me. I'm simply the one who thought this was a legitimate Audi model until I saw the side profile and am trying to explain that away in my mind).