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Welcome to A4A. How nice to have a choice of plots. I think I would ask about as to which plot to take. 5 poles is 130 sq yards which is for example 10 yards by 13 yards.
Personally I wouldn't rotovate it - any nasty perennials (thistles, bindweed, couch, etc) will get chopped up and you'll have a lovely crop of fresh young ones. Whatever you do - enjoy it. We love ours, the perfect bolt hole from the stresses of work. Half an hour pottering/watering on an early summer's evening and the troubles of the day drift away.
Personally I wouldn't rotovate it - any nasty perennials (thistles, bindweed, couch, etc) will get chopped up and you'll have a lovely crop of fresh young ones.