There are loads of things they could do with that garden (to make it better/easier to maintain etc) but it's not about that. He sees it as a status symbol...but status symbols are irrelevant when you're a dirty little groomer.If walking along with a lawnmower is such a problem, why not do something with parts of the garden so its not just a square of grass.
Sorry, Creepy, you might be pootling along on your big boy's ride-on but you'll still be a smelly little runt and social pariah. No amount of gadgets will change that.