Thanks for all of your help! Doesn’t seem like we missed out on anything I feel bad about. I believe things happen for a reason!
Yeah, I was not too crazy about that coop which obviously did not meet their needs and had to be modified. Where I live, those prefab coops are not built very well and sometimes people just give them away if you come to haul it off. On the other hand, building your coop is bound to be a lot more expensive than you think. I built my coop out of mostly left over material from other projects but still put in about $600 dollars into my 6X12 coop. And that was pre Pandemic when a 4X8 sheet of OSB sheeting cost about $7.00. Now I think that same OSB sheet costs about $4000.00 each!
Having chickens is a great experience. If your budget is tight, then saving money by reusing pallet wood may be an option. From experience, breaking down pallets to get good wood is a lot of work. But if you enjoy building the coop, then I guess it will be a labor of love.
If you plan on future upgrades, I would consider building a coop design that you could easily expand. I was not too impressed with the modifications made to the coop in your picture. It just looked off to me. But, knowing chickens, they probably could care less on the looks.
Because of my age, I designed my coop where I can fully stand up inside it to clean it out and perform any maintenance needed. I also made the back end door to drop down so I can easily push/shovel out the soiled coop litter. Because I live in northern Minnesota, I also made easy access from the main door to hang a feeder and put my waterer in the coop. I don't have to actually get into the coop for any daily chores. Even the nest boxes are accessed from a drop down door on the outside wall. What I am saying is that if you build your own coop, keep your physical needs in consideration because routine chores should not be difficult on you if you build the coop right.