I don't have any automatic turners with my incubators and have been hatching successfully for years. I turn my eggs manually three times a day, approx. 6a.m. 1p.m and 9-10p.m. I get a 99% success rate so I would say every 180 mins. would be fine.
By the way, I hatch chicken, bantam, duck, turkey, goose and quail.
(I have often forgotten to turn last thing at night but it doesn't seem to have made any difference!)