Are you elevating the cage? Are you doing the sides in wood also? You might want to use a 3 or 4 coats of polyurethane on the sides, sanding in between coats to make it smooth and limit climbing. Remember you have to use metal screen too, they will chew thru fiberglass screen. I would do the top in screen too for ventilation. When it gets cold you can cover it with a blanket and put the heat bulb under the bottom. If it gets really cold you may have to bring it in on occasion. Have you worked with wood before?