Too save money, check out Craigslist, type in the search box "dog kennel" or "dog run". You will likely find better quality used than new these days, as the dog kennels at the big box building supply and feed stores mostly couldn't contain a Chihuahua for any length of time and are ultra cheap Chinese junk. Look for panel style kennels that clamp together and come apart easily. These can be added onto as your chicken population expands, and are more portable and easier to haul away in a pickup truck when you buy them. When it comes to chainlink, you may need to add maybe 18 inches of 1 inch hex netting at the bottom of the run to keep your young birds from crawling through. I am actually using used 6 ft chainlink gates clamped together as a run for my chickens with a cover made of stock panels covered with 1" hex rabbit wire. They are easy to unclamp and reconfigure to meet changing needs. You will need to consider something to make your coop dig proof if you have skunks, possums, coyotes, foxes etc. I find laundry shelving to be portable and effective at deterring such activities and it is readily available at all the big box building supply places. I don't really like wood since termites are really bad where I live and for me, wood is a maintenance nightmare.
When using hotwires, ranchers have trouble when weeds grow up touching the wire, causing it to ground out and quit working, so they use ones powerful enough to burn weeds that touch it.Totally agree. Just need to overcome my own fears.
Not sure about the reference to burning weeds?