So I'm building an incubator for my Girlfriend's classroom. As a mechanical engineering student I enjoy making things complicated... So i want to make this incubator affordable, accurate and automatic. This is my basic plan ( ) but I'm going to modify a few things. Here is what I've decided on so far: Cooler Craigslist or Freecycle Cost: Free 2 lights Have these Cost: Free Not sure which of these I'll be using: waffer style thermostat: http://www.ebay.com/itm/22-AMP-WAFE...646?pt=LH_DefaultDomain_0&hash=item588aebd246 Cost: $28.00 after shipping or Bi-metal mechanical thermostat http://incubatorwarehouse.com/index...sories/bi-metal-egg-incubator-thermostat.html Cost: $18.91 after shipping thermometer/hygrometer: http://www.amazon.com/gp/product/B002J4C8K0?tag=vglnk-c964-20 Cost: $18.58 after shipping 2 CPU Fan 12 Volt 6-8cm off ebay/amazon. Have plenty of 12v inverters. Cost: ~$2.50 each Humidifier/Fogger http://www.ebay.com/itm/Mist-Maker-...380?pt=LH_DefaultDomain_0&hash=item25670cd9c4 (still trying to track down a free 24v inverter. Suggestions?) Cost: $3.79 sfter shipping So basically I need to work out the details on the Humidistat. I've seen many online at ebay... like this ( http://www.ebay.com/itm/Honeywell-D...359?pt=LH_DefaultDomain_0&hash=item3f0ded1ebf ) for about $25 after shipping. Just wondering if there is something out there thats cheaper??? Dont really wanna pay that much for a humidistat that is ultimatly not that important. Also need a little info on an auto egg turner. I've seen the kits but I'd like to make one. Any ideas on scavaging a cheap low rpm (1/20 or 1/10 rpm)? Also do eggs need to be oriented large side up and rotated 30 degrees (?) left and right of vertical or can they be rolled ( )? Is one way better than another??? I figure I can make either once I find a motor I like. Thanks for all the info. I've looked over most of the incubators on the BYC page so I know that I am probably making this more difficult than it needs to be but I do enjoy making things. Any suggestions, input or recommendations are greatly appreciated!!!!!