Everything pre-made in that price range is going to be flimsy. There is a poster here that has good luck with them but had to:
- Paint/stain all the wood
- Reinforce the wire panels
- Replace the hardware
And probably some other stuff I am forgetting. Hopefully she will pipe up with info directly since I couldn't remember a good search word to find one of her posts.
I previously had a much larger, more expensive, pre-made and can attest to the poor quality of the pre-mades even though it was one of the better made ones I found at the local feed stores. I kept it tarp covered to keep the rain off since that cheap wood will swell without additional sealing and built a pressure treated base for it to keep it off the ground (also because of the risk of swelling). I used this as a temporary coop while my locally made custom coop was being built.
It was still in good enough shape after 7 months (always covered, in a dry mild climate - my locally made coop ended up taking much longer to receive than I was originally told) that I was able to give it to a local tween that was just getting started in chickens and desperately needed a coop. He and his father were going to re-roof/paint/stain/reinforce the whole thing so were thrilled to have it.
I will say, if you have any larger predators these coops will be inadequate - a determined medium sized dog could destroy this type of coop easily.