Here's a couple pics of my QT. Nothing too elaborate. I have a 10g tank, a maxijet 900 for flow, a Nova Extreme t5 light fixture on a timer from lowes, and a small heater and digital thermometer, and a eheim hang on back filter for filtration. I check the s.g. and top off as necessary using a piece of electrical tape to see how much water evaporated. A QT doesn't have to be a all out reef set up. It really just needs to be adequate enough to keep your corals alive, so you can observe and treat them as necessary before putting them into your display tank.
This makes it easy to observe the corals up close, any time of the day to really make sure they're free of pests. It can be hard to get a close look like this once they're glued to your rocks.