I just started a batch of eggs today. This is my first batch. I built my incubator for less than $20 (to me). I had a big Igloo cooler that has been in the shed for several years without use. I cut out the top and put a pane of glass from a picture frame in it (Dollar Tree, $1). I bought a water heater thermostat ($8.47 Lowes). I had a receptacle box, a lamp fixture, a computer fan and a 12v wall wart. I cut a hole in the side of the receptacle box and drilled some holes in the other side. I also drilled a hole in one end to put the screw end of the lamp fixture in. I wired up the lamp and thermostat. I put the thermostat in so that I could adjust the temp and the temperature sensing part was where the fan would draw air across it. Then I attached the fan to the box so it draws air through the box. Then I screwed the box to the side, about half way up. I had some screen left over from another project and I made a barrier between the light and the eggs using it. I bought a thermometer/hygrometer combo ($7.99 local store I saw the same sort of thing at Walmart for 8.97) and attached it to the side of the box. I put my eggs (18) in an egg carton and then put a dowel in the bottom of the incubator. I can tilt the egg carton 2-3 times per day by just reaching in. I want to make a device that will turn the eggs automatically. I'm looking around for a slow moving motor.