I'm currently dealing with the same dilemma - how to get the best coop for my chickens in the spring, for very little money!
However, after pouring over coop designs and advice from other BYC members in the "coops" section - almost all of them kinda said the same thing. "Wish I had put a little more money into it" or "wish I hadn't reused that old shed/barn/structure/etc." When I was reading it, that didn't really help me (and probably doesn't help you either!). When I finally found an *amazing* home-made coop, I e mailed the member and it turned out the materials (without labor time) was nearly $1500!!
So, for me, I've narrowed it down to several cheap(ish) coop options. I think we're going with green chicken coops:
www.greenchickencoops.com. I'm still corresponding with them via e mail, but they are SUPER nice, and I love the eco-friendly gestures that go into all their coops. The coops also seem to have everything that chickens need, and are not to bad to look at!
Either that, or there are VERY cheap coops on
ebay, but they are for 4-6 hens MAX, so that's not a large flock.
This is the seller who carries them:
http://shop.ebay.com/darterry/m.html?_nkw=&_armrs=1&_from=&_ipg=
They are "Cumfy Pet" brand coops. Materials are made in China (of COURSE), though it's a British company. The coops come needing assembly, but the woman told me all you need is a screw-driver, and half a brain!
Hope this helps - good luck!