I am a lot of things, but I am NOT a carpenter. Zip ties are one of my favorite "construction" tools! Most of my coops came from Craigslist and usually fairly reasonably priced. My avatar coop was cheaper than listed because I offered to take it before the previous owners cleaned it out. Not a fun job, but financially great.
I also took a used doghouse and did a little renovation to turn it into a brooder house for my runner ducks. With my limited skills, I reattached the hinged roof (which blew off during a derecho wind storm) and dismantled a non-working box fan to use the grate as a ventilated door which I attached with hinges and a latch.
You can do this! And, congrats on your new flock!
I also took a used doghouse and did a little renovation to turn it into a brooder house for my runner ducks. With my limited skills, I reattached the hinged roof (which blew off during a derecho wind storm) and dismantled a non-working box fan to use the grate as a ventilated door which I attached with hinges and a latch.
You can do this! And, congrats on your new flock!