there is no need to be 20k acres. those noobish explorers with full CF all over are easy farming.
All you need to be is a 5-7k acres at 300+ NWPA and farm the 20k acres without even being able to retal back.
It's more fun to grab a 1500 acres (yeah, the pussies run GS) from a +20k acres.... while being ~7k :)
the morale: better be a well packed "smaller" province that can humiliate the X3 size noobs.
Everybody can do mills+forti+training and some sci pump with banks/schools. There is nothing special there.
Expect next age full waves over top 10 noobish explorers, without any pussy warning (like 1 week War preparation agreement - WTF is that?).
My last experience, which I plan to repeat next age, was a 7k acres with 300 opa - doing a grab over Cheese at 20k acres and without possibility for retaliation. Today's utopia is far more easier than in the past, the maximum OPA archievable is 600 per acre, with a 150 dpa home >>> 330 NWPA. That's insane, since a 7k acres can hold 4m offense points (can brake about 700k def specs @ 140% def ME).