Great, I love the flexibility.
If the floor is elevated you can put a wire floor in one or more of those sections and have a broody buster as well as for medical/behavioral reasons. My permanent 3' x 6' brooder has 1/2" hardware floor and is up off of the coop floor. The poop falls through until the chicks are maybe 12 weeks old so it stays really clean and dry with chicks. With adults you have to clean poop, it won't all go through.
In winter I put a piece of plywood under the heat lamp to give them good wind protection from underneath and to retain some heat better. I just dump the poop off of that. And I hang plastic to stop breezes. In summer I do less.
Some (not all, but some) wire mesh can have sharp points on it that can tear up the feet. Check before you install it. All those points should be on the same side so if your wire has it point that side down.
I'll include a couple of photos so you can see what I'm talking about.
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