"A-Frame" Chicken Tractors: Ideas and Pics!!

[Gresh]

Hi, all! I was looking on the internet awhile ago and was really impressed with some of the "a-frame" chicken tractor designs out there. I was wondering if you all wouldn't mind posting pics of your a-frames and ideas on how to build them cheap (by cheap, I must clarify a range of $175 dollars or less). I am wanting to build one that will house roughly four medium-sized chickens or two large sized chickens.

Happy chickening!