they're not homebrew, but the best prices i've found for hovabator is from LLL Reptile supply (they're in california).
I purchased the 1602 and 1582 at the same time, added fans to each (computer fans, wired with old cell phone chargers) and put a turner in the 1602.
the 1582 is the picture window variety, I'll use for hatching the eggs.
so, even with the 2 incubators and used (
ebay) turner, I still have less than $150 in them.
if you want to build (homebrew), the most expensive part is going to be the cabinet. I still recommend turner and fan for circulating the air or else you end up with hot spots.
If you would like to build it yourself, PM me and I could help walk you through the wiring parts...
there are tons of homebrew incubators on byc, i recommend browsing through them and reading up on what was done...
I am planning a 'bator build, but looking for just the right cabinet first... my plan is to put the brooder in the bottom and 'bator on the top part. but so far i'm still shopping for cabinets.
if you have a Habitat Re-Store, I recommend checking out what they've got as you might find a cabinet that will work for what you want to do. i tend to over-plan everything, but have just ... 8 days remaining until hatch. (lockdown the 18th) so... i better build my brooder soon LOL