What a question. My goals may be quite a bot different from yours but if money were no object.
A large walk-in coop, with a chicken-proof shed attached to store feed and other stuff. Being able to enter the coop either through the run or that shed.
Electricity with a few different outlets, both inside and outside the coop. A light inside the coop with switches at both doors, a light in the shed, and a light outside the coop run door, all on different circuits.
Two more nests than I need with a space attached where I could feed and water, plus poop space. The primary purpose would be to isolate a broody hen, but also a good place to keep an injured chicken with the flock but separated. It could also be a broody buster area.
The coop would have a wall to split it into two separate areas. You could open a door and make it one coop if you wanted. One side would have a built in brooder. After they are ready to leave the brooder, shut the door and they have a separate coop space. Pop doors on each half, leading into a run that could be split. This makes half the coop and run a grow-out space.
Removable roosts.
A large covered run.
A frost-free water spigot just outside the run and coop.
Coop and run positioned where rainwater runoff flows away from them, not toward them.