For the "proper lawn" a good commercial grade Z-turn, not the crap found at Home Depot or Lowes. If outside the fence is fairly smooth, and free of debris, the Z might be fine for that also. Otherwise .... a "bush hog" behind a tractor once a year... mebbe you can find a neighbor (current owner mebbe?) that can do it? It looks like an awesome get-away place
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Good luck!