right now I just want to know how difficult it would be before I actually invest my time doing it.
Very difficult
Very expensive
Very low chance of success.
But we may just be armchair relics not appreciating the sear determination and unbound energy that you may unleash onto the challenge just to prove us wrong.
Actually years ago I think I read of such a project, but it used a buried wire to define the course that the lawnmower just had to be controlled to stay centered over the top of the wire path. I don't recall any other details but it was a working design.
Lefty