It is overwhelming. I ended up finding a neat YouTube video while looking up how to make an egg candler. It was much more helpful to see videos than to read the tutorials.
I work in a hospital so I got a Styrofoam cooler for free from a vaccine shipment and the rest of the wiring bits and light fixture from a local junk shop for less than a dollar. The only thing that cost me was the thermostat, which was $8 at Lowes. So I have a still air LG with the autoturner that cost me a little over $100 and the $9 homemade one which has better controls on temp and humidity, a better viewing area and its just cool I made it myself! Like Cluckitall, I wish I had made it bigger. I can't fit a turner in it and it probably maxes out at a dozen eggs at a time.