That's pretty huge for a hatchling. I would make sure to put a lot of clutter so it doesn't seem like a big, wide open area and cause stress. Cool side is too hot by a bit. What are the temps inside the hides? What type of heating device(s) are you using? A male could live in that size for a pretty long time. He would eventually outgrow it, but with correct diet it should take at least a few years. A female would probably outgrow it by about 1.5-2 years.