I started with a prefab coop also, as I needed something quick and I had no idea what would even be good to build. In general, I liked the coop, although it was only sufficient for my two girls, even though it was purported to house up to 4. The run was always insufficient, and I added on right away, then made them a fenced yard inside my fenced backyard. Then I added one more hen, and the coop was too small for them to feel uncrowded.The coop held up well where I live, but we don't have to deal with snow. I have since built a new coop, still small, but larger and much sturdier than the prefab, and am almost finished with the new run. My advice is go ahead and get a prefab to start, knowing that it is just a starting place. Then get a covered dog run to put it in, there is no prefab on the market that has a large enough run. I think Dobielover's suggestion of an Amish built coop is great, it will surely be better than a mail order prefab. That can be put in a dog run. Bottom line, if I had to do it all over again, it would have been cheaper and easier to have hired someone to build a coop and run in the first place. Every one says so on here, and they are right. However, I feel that I needed to get familiar with the needs of the chickens, and what worked for me, before I could even make any decisions about permanent housing. I'm keeping my small prefab, they do have a good use for introducing new chickens, or I might get silkies or seramas to put in it. Chicken math, you know.