Grow room blueprint

Hi everybody, I am thinking about turning my basement into a grow room, the ecosystem down there is superior to my other grow room in the laundry room upstairs which I also converted. I want to do this right, I will be putting up framed walls and custom ventilation with CO2 rain system worked in. Does anybody have any input on how to customize the grow room to the fullest? I want to Make it with a built-in floor drain with reservoirs and some kind of irrigation system, I suggestions