Check your local craigslist.com too, there's several people in my area that make them for resale, very cute red/white barn style coops for $275 (holds 8 chickens, no run), and occasionally there's people selling their tractors, sheds, or even a child's wooden playhouse. I saw someone on here score a very cute little house for $150.
The shed's are exspensive, but durable and multi purpose. If we had the money, I wanted one of those 10x16 gable roofed sheds done to match the house, with a door on either end. Build a solid wall at the 10 ft mark, so that the front 10x10 area is for outdoor storage, and the back 6x10 area is for chickens. Placed in the yard on the edge, 30 feet from the back property line, so that the run would be behind it taking up that end of the yard. Giving the chickens 36x10 ft total. Then building a deck around the pond, with a seating area to look at the pond, pool, and chicken run. Add some landscaping, a cute wrought iron fence to seperate this lounge area from the dog area... it would be SO pretty.
But... it would also cost about $7,000 to do everything I have in mind. So, the chickens live in a recycled giant dog house for now with a run made out of scrap wood and scavenged materials. I banged my thumb three times with a hammer and broke a nail, but they're comfortable and my total cost was $100.