Duck eggs are better off laying on their sides, same for the incubator. You will have a lower hatch rate, if you put them pointy side down. So don't use the chicken egg cups in the turner. Most incubators are designed to work best at room temperature, so I would not suggest to use the basement. I personally prefer the kitchen, because you have the sink near by. Especially with duck eggs, which need to get misted daily with warm water starting with day 4. The humidity should be around 55% and then at 75% for lock down. Also start the incubator now so the temp and humidity is stable when you are getting ready tonight.
Mine are hatching right now. I've started to get the brooder going yesterday. Today I ground up their food and mixed on their vitamin/electrolyte water. Lots of things to do.
Katharina