I've never seen a good caresheet for monitors.
Timorensis is semi-arboreal and requires an enclosure taller than it is long/wide. You are going to want to build something with minimal ventilation (no screen) so it will hold heat and humidity.
http://repticzone.com/forums/Monitor...s/1272637.html
That thread is a good cage-building thread. An adult should have a minimum of a 4x2x6 foot (LxWxH) enclosure. This is 2x the length of the monitor in cage length, 1x the length of the monitor in width, and enough height for the monitor to feel secure.
They are what is usually called very "skittish", though their behavior is actually just defensive behavior due to their size. Remember they are a smaller monitor and have constant fear of being eaten. Handling these guys is a bad idea.
http://savannahmonitor.org/taming/
That page has a good discussion of handling, varanid species independent.
They need tons of hiding areas and brush in the cage. The height of the cage is needed as they feel most secure when they are higher up, even above you would be nice.
As far as food, like most monitors they will do better on a diet of larger insects than all-rodent. Roaches should be a great staple, discoid or dubia are easy to keep and reproduce.
Hope that helps a bit.