I have hatched several batches of ducklings and dozens of sets of chickens with a cheap styrofoam little giant incubator and hovabator egg turner. I did add an external thermostat, https://www.amazon.com/gp/aw/d/B01HXM5UAC/ref=ppx_yo_mob_b_inactive_ship_o0_img?ie=UTF8&psc=1. Cheap incubators work on timers not thermostats so adding one made all the difference for me. If you decide to go that route I will be happy to explain what settings I use.
