Like a sideways version of that little Hiller flying platform with the lifting duct?Its a pusher and 15 " of flow clearance from the fins, Not a problem, will use wide chord blades. And I do have a coanda/fan fin in the works (part notar ,part fenstron) or as translated-little window.
That's why I suggested the airfoil tail as a supplement rather than the only means of counter-torque. Though I've seen some models fly with a movable rudder at the end of the boom to deflect the airstream.fat airfoil booms not needed flow fences or strakes will do the job- NOTAR has yaw instability and requires SAS and airfoil tails can't change for different torque events and add drag.
the coanda/fan fin uses an idea of a smaller fan/fin incorporated together without the draggy boom. It's a work in progress fan & duct done just need to run it... other stuff going now.