Here is an example of a decent cage for small to medium size monitor lizards. ( I know I have Savs, but aside from your Timor being an arboreal lizard, the husbandry is nearly identical)



I have since added a platform made from slab wood I got at a saw mill for free, it looks like this.



If you look close, you can see the burrow hole too. They also have dug tunnels under the platforms..

This hole on the surface is quite small, I set the cam on macro and shined a flashlight down the hole to get these.






I will post some more for you soon... Meanwhile, enjoy a nice video.