Hi there,
Being one of the larger members of the prasinus complex, being smaller than only Varanus macraei, I offer my beccari a larger sized enclosure when compared to my prasinus or boehmei. I currently keep a pair of Black Tree Monitors together in an enclosure which measures 5' wide x 6' tall x 2.5' deep. The walls consist of white tileboard, sealed at the corners by silicon.
The bottom consists of a large cement mixing pan filled with approximately 2-3" of water at the bottom.. The cage is adorn with limbs and silk plants. There is also many cork tubes and flats attached to the cage walls, to provide ample hiding spots for the animals to feel secure.
I wrote a rather lengthy post earlier this month about how I care for, and most importantly acclimate wild caught tree monitors. I recommend you check that out, as you said you would rather avoid experiencing a death.... Tree monitors can be difficult animals to care for...
Anyways, I hope this helps a bit, I have a few pics of my tree monitor enclosures on my website, however, they are long overdue to be updated..I've got a better camera now, and just need to come up with some free time to update the photos and my site... A lot of new, interesting stuff has been going on here...
Cheers folks,
bob
The Odatriad