Find out the thickness of the glass. Allot of times, builders use thinner glass to lessen the expense. It will retain water, but you will not know for how long. You can usually notice alot of bowing near the center when the tank is full of water.
Regarding thermometers, I'm not sure if it's popular there or not, but I like using Lifeguard Big Time and Temp Alert
on all my tanks. It's big so you can see the temp at a distance and there is an alarm, so if the temp goes below or above the range that you set, the alarm will go off.
Timers are commonly used for lights.
A wooden stand is nice, but make sure it looks strong. And if you're area is prone to flooding, then you might look into other materials. I know some people here just use cinder blocks for stands, since it's cheap.