30" is simply not wide enough for a standard wheelchair. In fact, many current wheelchairs require 42" clearance, but 36" is the minimum. That doesn’t mean that the mobility challenged can’t use your space, but they would have to be able to navigate that 7" step and get through the front door on their own power.
That doesn’t mean the layout once you are inside the unit can’t be a selling point, but I don’t think you could mark it as handicap accessible with those two obstacles.