Whether a tub will work for you depends largely on your ambient temperatures. If the room he stays in gets below 76deg F in winter, then a tub will make it very difficult to add supplemental heating (lamp, CHE, etc.). Remember, a heat pad (UTH) should only be used to create a hot spot; it will NOT be sufficient to raise ambient temps more than a couple of degrees at best. Look into a PVC cage if you need better humidity and will need supplemental heating without a temperature-controlled room.