only problems IMO are the heat lamp and the 30g.
a 30g CAN be good, just clutter it up a bit with foliage. a 10 gallon or 20 gallon is ideal, but as i said, foliage can make it look nice, AND provide extra security ;p

the heat lamp will suck out humidity, so monitor that CLOSELY.

one more thing: if its a glass tank (im guessing it is), cover 3/4 of the sides of the tank to also increase security =p.

pics of the setup would be much appreciated =]