I fly for ACA and I'm based in CVG (trying to transfer to BOS).
Anyway, here it is, the Holiday Inn in Floerence, KY. The rooms are $ 29.00/night for airline crews. They do not take reservations because the rate is so cheap. But they assure me that they always have rooms. You have to ask for that rate.
8050 Holiday Place
Florence, KY 41042
The hotel is about 10 miles south of the airport. They also have free van service to the airport but I think you have to call for it on arrival at CVG.
I think most of my class stays there.
Hope this helps.