My very last eggs were nice and cozy in an incubator and I had 3 power outages. I had to use hand warmers to keep-m' warm til the electric came back on. I don't see a problem with you building a bigger bator, sometimes you do what you gotta do, just keep an eye out. 16/17 hatched in this batch, although momma had some. It was cold and the hen was too small to take all when power went out.