Hi
Don't sell your Mini. I have the same setup, trailer and Mini with the areo kit. A simple fix is to take the factory ramps off. I then had aluminium ramps made with a longer ramp that fit in between the side flange of the old ramps. They lock in at the top of the flat part where the tire rest when loaded. The ramps are stored on the front of the trailer inside a vinyl zip case that act as a car shield. The car tows great. Also, when loading I do not unlock the tilt.
Hope this helps