I agree with Jordan. I'm not sure what your budget is but I'd honestly ditch the Exo Terra tank in favor of a tub set up and use that money to buy a Herpstat thermostat (if you foresee yourself having more than one heat source in the future you might as well get the Herpstat 2) Honestly the best thing you can spend money on and early on. Cannot recommend Herpstats enough!
You can always upgrade baby to their final enclosure laterand even then you might as well buy a PVC cage like Animal Plastics. Up to you in the end of course!