I just came back from a convention so of course I can't find my cord to transfer pics from it to the computer...
I kept most of my snakes in a walk in closet, It was easy to keep it at 80 degrees. I also kept my feeder mice on a wheeled cart and tarantulas.

I have since moved and use the same black wire rack you use, I keep my feeders on the lower racks, and keep my snakes and t's on the upper racks.
I keep them in a utility room that is insulated but has a concrete floor. And one window. It has a door that is more like one to a garden shed with a screen door. I have that covered with a plastic sheet and styrofoam insulation. I am going to do the outside of the door on Thurs, the window is done, and a plastic edge around the entry door. That door is on my enclosed back porch, which I have also had to put plastic up on.
I use a heater to keep the room at a certain temp, around 78-80. And have a wide variety of rugs on the floor.
I also keep all doors to it locked since they could be entered from outside.

Carol