Well yeah you will need a heat gun and thermometers. I guess I didn't really take that into account. Either way, a thermometer and hydrometer together is $15 (ac-urite). I put the dimmer on my list because the whole point was to prove that you can indeed do a setup for under $100. Adding a thermostat would put you over, but is preferred. If people are on a tight budget, its better they have something to regulate the heat.