There are some species of monitor that stay small. I think like ackies do, not sure if thats what theyre called?
I would turn it into a sweet naturalistic desert setup and put like 1.4 leopard geckos in there. Im not sure if housing them together like this would be a good idea but it would certainly be very cool!
I have heard of a few monitors that are only a few feet long, but even still i would feel bad because idk if it would be sufficient. a natural desert style would be neat or something amazon-ish with a stream and moss and stuff oh the possibilities
0.1 Normal BP - Lily
1.0 Ghost Corn - Colonel "Kernal" Patton A.K.A. Cornbread.
1.0 Hog Island - King Tut