Be sure you have a left side door to get in and out of the car when loaded..
Once again, overkill unless you don't have a leg to stand on...
I have only had two of my 20 trailers with the escape door and have trailered thousands, yes thousands of cars! That 4-car stacker was the most fun to get in and out of, but again it is not really needed. I have towed new Challengers, Chargers, Mustangs, and Camaro's with no escape door and on 3500 lb axles without having issues getting in and out of them, and I have quite the overhang, and not being overweight either...