We have breeders here in Oregon, but I don't know about CO.
I run AGH and KuneKune breeds through rotational grazing.
As for fencing, I was just like you a few years ago and had to use trial and error, here's what I have figured out.
Farrowing Paddocks - you'll want the smaller netting 3" or 3.5" size openings at the bottom
-OR- set up 2x4" woven wire fencing with one strand of electric twine/rope/wire running inside the metal fencing, about 4-6" off the ground. I prefer the netting as it is cheaper and larger than the 100' woven wire I can buy in my area, but I use both. If you buy the netting you will want to buy extra step in posts for making adjustments in your netting between the posts of the net. I've found that if the piglets first 'fence' experiences involve them breaking out, they are always testing your fences from then on. I've had several litters over 3 years now, and the difference between well trained piglets and those that have started off with bad habits is night and day. So get your nursery fencing right and you'll be off to a great start! You could use several lines of twine, 3-4" apart to make your own piglet enclosure, but I like the safety from predators the nets provide until the piglets have grown a bit.
For one net I use 1 or 1.5 joule energizers, you wont need much in the way of shock and it's nice to have light duty energizers for small enclosures. Even two nets combined won't need anything bigger. You want to look at 'output joules' and not feet/miles covered. Ratings for energizers can be deceptive, with output joules you know what your getting.
Because I'm still moving the animals in areas without semi-permanent fencing I use plastic tubs to keep the energizer, a power strip and extension cords in. I run a power cord to the strip inside the tub and plug the energizer into the power strip. In the winter, if I feel the pigs need a light for extra heat in their movable house I can run a short power cord from the strip in the tub out to a light in their house. The tub keeps the energizer dry and protected. I cut two notches near one end of the tub, one on the right and one on the left - cutting through the top rim, about 1" down. I use the notches for cords, energizer green goes out the left notch to the grounding rod; and the energizer red goes out the right notch to the netting. When the lid snaps on, the notches are under the lip of the lid and safe from water entry. The pigs house, energizer tub and netting are all easily moved. And I can store the energizes and their tubs in the garage until needed. I even keep extra rope and home-made mite spray in my tubs. One day I may switch to a central, powerful energizer system, but this works so great I'm in no hurry.
Once weaned (18 to 24 months) you can move the piglets (not mom) and the netting to a new fresh area. Mom goes back in with the sows, or boars for re-breeding. And piglets can be sold from here or left for a couple more months to put on weight and grow bigger for the adult pig areas.
Pig Paddocks - I use two strands of white twine, and run my lines using T-posts and
trees, I use step-ins to make adjustments where needed.
We are getting a
dairy cow soon and I will be making semi-permanent paddocks that can then be section off using the electric twine. There are negatives to electric nets - they stretch over time, sag at the bottom and the ground line can pop out of the posts. So I use mine on my flatter ground near the house for temp housing set ups or for piglets. It just works out much better to use twine/wire to cover larger areas.
I've only used Kencove.com for supplies so far - but you have to ask to make sure what your ordering is in stock and will ship out or it can take weeks for your order to arrive (and they don't necessarily tell you if something is out of stock). Also, you'll want to check your order when it arrives and count everything. I've come up short on step-ins, and had one reel sent broken. They are very nice and helpful, but you have to stay on top of things. The ship out replacements but it still takes a week to get them for me, I'm on the west coast.
Right now Kencove has 660 feet of twine on a reel for $20 - these mini reels are great for sectioning off areas.