i am really wanting a beardie right now but my mom and dad wont let me do anything unless i know exactly what to get for its cage and how much it will cost. do they need undertank heaters ? i know hot rocks are bad news and i dont use one for my ball but i dont know if beardies need them and i thought instead of buying a new cage everytime he outgrows it i would just buy the cage he needs now and not worry about it, is that a good or bad idea ? what kind of substate should i use for it ? ...............umm well i think thats all the questions i have for now. (please dont think im doing all my research here. i am checking all over the place but i thought i would ask here first since everybody seems to know everything !