I want to build a crested gecko enclosure with a book shelf underneath to make space and my boyfriend happy (I’m just finishing my leopard’s cage) but I still have too many tanks. I have two definite females crested(adult), two probably females (juveniles) and one very likely male (juvenile). Right now the adult females are in a 29 gallon and the other three are in separate 10 gallon tanks, I was wondering if a 55 or 60 gallon tank dimension would work. I wanting to make it out of poplar with a Plexiglas front and it would have divider to separate them. Before I go and buy the supplies I wanted to make sure this was enough room for them.