Thats deff. a real F-40..... Kit cars are usually less agressive Ferraris.
Here is an MKII MR2 with a ferrari kit:
And that is one of the best most expensive kits... and you can tell its not real.
The owner probably didn't know it was gonna snow? I can't imagine someone so rich that they wouldn't care.
*On a side note, that looks like the house from American Beauty, hmm