We bought some from Fast Fence and after a year of attempting to use it on
chickens, pigs, and cows, we now call it "hold nothing netting." I think if you were to use it with adult
chickens (heavy breed or with clipped wings) it might work. But we started with chicks, which turned into pullets, who figured out very quickly they could go right thru the netting. And did. As adults they went under it, but I think this is mostly because they had always been able to get around it and were determined to do so. We gave up and fenced off the
yard (five foot high no climb wire with t posts) so that we could have free range
chickens with a range that did not include the garden.
Pigs went under it pretty quickly. Cows stayed in it until we laid it down to move them from one pen to another - as soon as they realize they can walk over it, they do, even when it's standing up. Unfortunately we didn't realize this until after the fact, or we'd probably still be able to use it for cows.
It's a lot of work to move the fence, especially if you're by yourself. You have to pick up and carry the entire fence at once, pretty much. It helps greatly to have at least enough fencing for two pens, gives more options. Plan on spending at least thirty minutes a day moving fence.
As to the question of space....that really depends. At least in our pasture, different areas of the pasture are able to support animals for different periods of time. IT also varies with time of year, generally towards the end of the summer it takes longer for things to grow back after the last grazing, or you have to move animals more quickly because they eat the sparser vegetation down faster.
Our soil drains
water really well, too well actually. So a big part of problem was that as the soil dried out, the ground for the electric shock went away, which meant by the end of the summer the shock pulses were like a static shock. That's not enough to hold anyone in or out. I guess putting the grounding rod in a permanently moist spot could help this?
Regarding cement fence pole holders.....it's never easy to move something heavy every day. WHen the fence is staked properly it stays upright just fine.