I have hogs and the can tough on fencing and gates.
Before you start fencing do some research and do it right. Materials are not cheap and a fair amount of labor goes in putting it up.
My 2 cents regarding fencing in the context of containing hogs…..
Welded wire fencing is a worthless waste of time & $$$
Woven Field Fencing like pictured in “post #28” will work if installed correctly. That means proper braced posts at the corners, straight runs, and tightly streched. This becomes a permanent installation.
Hog Panel or Cattle panel can be installed with just wire tying them to T-posts. Does not need to be in straight runs. Can be taken down and materials reused.
Pros & Cons……
Hog or Cattle Panel is more expensive per foot than running Field Fence. But the panel is quicker easier to repair if a tree falls through it.
I have done both ways. Along straight clear property lines - Field Fencing. Snaking through the woods - Cattle panel.
Also regarding the you tube in post #28, I didn’t watch the video, but based on the picture don’t staple the fence to the tree. Three reasons off the top of my head, the staples won’t hold in the bark, the tree will grow around the wire so you won’t be able to re stretch the fence, and if you ever have to take a chainsaw to that tree….good luck. If you want to use a tree as a post, first nail a treated board to the tree, then secure the fence to the board.
Electric fencing is great for “cross fencing“ ie subdividing a pasture. But not suitable by itself for a primary perimeter fence.