How many chickens do you have and how big do you want your run to be?
I'm in a similar situation as you. I'm trying to hire a handyman or a fence company to build a run for me because I want something about 42' L x 20' W and nothing pre-made is that large. I like working with my hands and figuring things out, but I don't have tools or carpentry skills, and with two young kids to look after, I just don't have the time I'd need to learn and tackle such a project.
Anyway, over the last 1.5 weeks I've contacted at least 12 different handymen/contractors/fence companies. TWO have contacted me back. Of those two, one has stood me up twice. The other handyman seems promising, came out, took measurements, had some good ideas. Still waiting for his quote after three days...fingers crossed he'll get back to me over the weekend. I'm expecting I'm going to pay good money for this, so I don't know why folks who build decks and fences, find this such an unappealing project. Sorry that my frustration is spilling over into your post, haha!
Anyway, here are some things that I found in my search. I can't vouch for their quality, but they have caught my interest.
https://www.wayfair.com/pet/pdp/e-z-frames-10-ft-w-x-20-ft-d-chicken-run-w000499405.html
It's just the brackets and instructions. You'd have to get the wood. Apparently you can take the instructions to the hardware store, and they'll cut the lumber for you. Wayfair says for a $100-something fee, you can add on assembly. Of course, you'd have to put up the wire.
I don't know how many chickens you have, but I used to be really interested in these coops/runs until the good folks on BYC said I'd need something bigger for the amount of chickens I'd like to have. The link is to their 4 foot high run. They also have a 6 foot high version.
https://overezchickencoop.com/product/rugged-ranch-chicken-run-7x16x4/
Good luck in your search. I hope you find something!