There is no law against a really big motor cycle. I don't think
   you need to fold the main wings. Two wing pivots like the F14 should
   do it.
   Two eleven foot long wing panels and a 5.6 foot wide center section
   should do it. Total span is 27.6 feet. About the same as an RV. If
   the root
   cord is 4 feet that gives you a legal 8 foot wide road vehicle.
   You may still need to fold the horizontal tail but I think 8 foot span
   may be enough if the tail boom is long enough which it appears to be.
   Folding mechanisms are heavy.

   This is a very doable flying car but the performance in the air will
   be modest due to the ducted fan. (Not shown yet.)


   --
   Paul Lamar ...No rotor no motor.

Paul,
You should check out the neat fold away prop they have on the Stemme
motorglider. A really cool idea that might have applications on a
roadable vehicle. In the layout you have done the ground clearance might
be the problem, but that would effect the fan as well.
Bill Jepson

The suspension height will be adjustable with air pressure.
Lots of suspension travel.

Paul Lamar

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