I'm going to post some pics of ways to house most geckos from Rhacodactylus, Eurydactylodes, and Bavayia cheaply and efficiently. Disregard the dirty food bowls, It was feeding time the night before(taken in the AM)
First, a simple enclosure for Eurydactylodes, Bavayia, and baby cresteds, gargoyles, and Sarasinorium.
Currently houses a surplus male E. Agricolae.
Dimensions are: 16.5x11.5x6.25 (inches) 12 quarts
Second is a taller version of the tub before mentioned. Great for young Chahoua, baby Leachianus, and smaller adult cresteds, gargoyles, and Sarasinorium.
Currently houses 20 gram Pine Isle Chahoua
And now for what you all want to see. The dimensions for these containers are roughly 24x16.5x11 (inches) and are 56 quarts.
This one is currently housing a 75 gram female leachianus
This gecko is around 140 grams.
As you can see, an island locality has no issue with this container all the way to adulthood. I also use these to house groups of gargoyles, pairs of Chahoua, and groups of Sarasinorium.
I would recommend moving up in size again for any gecko over 150 grams. Hope this helps some.