I don't think I read how many clutches you are expecting. But if you are expecting a small number like 3 or 4, just do what I did. It took me a total of 5 minutes to piece together and worked perfectly. I hatched my first 3 clutches this way with no problem.

I bought a large cooler (the kind you'd take to a beach or on a boat). I then bought a prewired sheet long enough to cover the bottom of 11 inch heat-tape (im sure 3 or 4in will work as well), since it was prewired it was plug and play ready. I then bought a computer fan that was also plug and play ready. Next I made a small hole in the cooler to allow the wires to run from the inside out. Lastly I laid the heat-tape on the bottom, placed water bottles over it (for temp stability) fastened the fan to the top of the cooler, plugged in the heat-tape to my thermostat and viola! Good to go.