(speaking of which-could I move the eggs mid cycle?
Yes ... it's quite common to do that.
Run both alonside each other and make sure temp and humidity are ok .... then just move them
Often, when people are using weight loss calculations, eggs are moved to incubators with lower or higher...
The point about basements ... spiders and all ... is the temperature stability.
Provided it is not too cold, incubators work much better with stable ambient temps. (well the cheaper ones do because of the nature of their temp. controllers)
hth