3 years old she should be eating much much bigger than pups - my 3 y/o eats large rats every 10days but I imagine yours is a little small due to it's previous ownership. hides can be half logs but they are not great. This are in almost every pet store and are the best IMO. http://www.exo-terra.com/en/products/reptile_cave.php
I would invest in a thermostat or a rheostat - personally i don't like rheostats but not everyone can get a proportional thermostat. http://www.zoomed.com/db/products/En...I7czoxOiIwIjt9 this works okay for a beginner but ideally you would like to have one of these - http://spyderrobotics.com/products/herpstat.html