Spin "Gravity" and the gravity from mass are two very very different things. The maximum spin "gravity" you can generate depends mostly on the strength of the steel, Plexiglass, or clear aluminum you use. It also depends some on the radius of your wheel and how much it weights (mass), but only this because it takes a stronger rope to swing a 2 ton bucket around than a 2 kg bucket. The spin would also need to be in the plane of the orbit if you wanted to keep the light coming in through the floor.
There are issues with the conservation of rotational momentum if you want to add more mass to the ring or shift stuff around from the center to the edge. I believe these could be easily solved given that we could build it in the first place. Venus Equilateral lives again! (V.Equ. is a book by the way)
(Edit: what I get for starting and then getting pulled off to work on my real job
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