Given that although I am quite good at putting stuff together and making things work mechanically sound, I'm no expert on applying electronics in the same, seamless fashion.

Do you mind providing instructions on how you built it? Or could anyone else recommend a small, one-clutch-at-a-time incubator that could do the job?

I have been looking at the Zoo Med Reptibator Egg Incubator, found it on Amazon for about 100 including shipping... Hoping to find something cheaper, but I haven't come across anything as of yet.