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I'm not looking for trophy-size LMB or bream, just decently aggressive fish in the 2-3 pound range for LMB and above average BGs and REs.

You can do that in 3/4 acre.

Local soil and experts will have the best input on whether or not to fertilize, but I think you can build the pond, stock it, and see how your natural fertility is, then decide if you want to fertilize.

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... free-range chickens ...

Those can be dangerous, if you chew gum.

"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
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