I have a couple of different plans for the CP hoop coops - from larger, walk-in 8x8' to smaller 3x5' that are only knee height. If you want to "tractor" them around, you can add wheels or make them a little smaller to make them lighter.
I am currently working on putting together CP "A-Frame" tractors. Using 2 cattle panels, I cut them "in half" (you'll end up cutting off a spike of wire & 1 tractor will be 1 square longer than the other) - this gives you two tractors. My base is 2x4" treated lumber - 5x8'. The top is ... haven't measured - the two panels are 50" tall and leaning together in the center.
When they are completely done, they will have a "gate" on each end that is made from CP, covered with wire - extending up from bottom about 3 or 4 squares? I will be using fence staples that aren't completely driven in tight to hold the gate and it will open downward to allow inner access to chickens, nest box (in future) and water. Then the top triangle part will be solid material. Playing with that still. Right now, they have just 2x4 wire secured to the base and zip tied all the way up the triangular A-Frame. I will be doing HC aprons that can be raised and snapped up out of the way while moving, then dropped back down and pinned into place.
I currently have 6 young chickens in each tractor and at the moment move forward 1 full length every other day. I have access to lots of cardboard, right now, they are "roofed" by large sections of cardboard boxes that are just hung over the A-frame. Will be tarping 1/2 of the tractor though. I don't have the roosts or the nest box installed yet, either. They have temporary branches for roosts and so far, no interest.
Will take pictures and share tomorrow. Can also do a "not blueprint style" drawing showing what the gates at each end will look like. When I'm done, we'll have 4 A-Frame coops and 2 smaller hooped coops. The chickens are no longer allowed to free range - we lost the flocks of 55 Flowery Hens, Bielefelders, CLBs & RBs between late last fall thru the winter. These tractors are being moved so that they have clean ground and I get a great growing "new" section of grasses... and hopefully next year, I will be hatching my own replacements instead of buying them again. I am picking up a replacement flock of 55 Flowery Hens (5 pullets and 1 roo) tomorrow morning and I am REALLY looking forward to getting them!! That means that I've replaced all of my flocks EXCEPT for the Bielefelders, which I haven't found yet (w/o ordering directly from GFF, which I'm not doing just yet).
If you are going to be getting your coop done relatively quickly - just one tractor that size, that you move along your yard or pasture, should suffice with that number of birds. As they mature/get larger, you could build a 2nd tractor and have them side by side or front to rear, etc w/ 5 birds in each. As I'm watching my birds mature, I'm thinking that I don't want any more that 4 birds in a tractor - 3 hens/1 roo. We'll see.
