Additional finished room in the basement

[Tarik N.]

Hello, I need advice on this: I am closing on a duplex in two weeks, and there is an extra finished room in the basement that doesn't belong to either unit and that has its own key. My question is: what do I do with it? I could provide it as an additional room for one of the units and charge an extra $50 a month? Any ideas and suggestions are much appreciated. Thank you