Mine are portable. Each panel is 20 foot long and 5 foot 2 inches tall. They have 3 inch end, center, vertical tube steel posts. The top and bottoms are 3 inch by 1 1/2" rectangular tube steel. They are faced with 20 foot by 5 foot sheep panels with a 4 inch grid. The ends pin together with 3 inch tube steel members top and bottom. Here is a break down of cost per panel at current prices.
3 inch vertical tube steel members 5 feet tall - $27.40
1 1/2 inch by 3 inch rectangular tube steel top, bottom and mid rail - $52.80
20 foot by 5 foot sheep panel stitch welded to the steel- $38
2 inch tube steel eyes on end for pins is 4 pieces cut 6 inches long, 1 1/4 inch pipe pins 14 inches long (1 5/8 O.D.) with scrap metal slide cap - $18.50
$137 total per 20 foot panel. Plus paint. Welding rod cost too needs to be considered.
You can set them on wood for cribbing. I use scrap 2 by 4 or 2 by 6. That keeps it off of the ground and prevents rust and galvanic corrosion.
It takes 2 people to manually load each panel on a flat bed.
I can disassemble and load it all on a flatbed with the tractor bucket in less than an hour. That includes the chute and head gate, medina hinge gates, cut gates, crowding gate, slide gates and panels.
Sometimes I haul it to the house and just use a part of the whole system. It all depends of where animals are, how many I am backgrounding etc.
Cows have hit it pretty hard at times. Once they actually moved one of the back corners about 6 inches so I have started driving one T- post at the chute to hold it all in place.