Varies quite a bit by both location, csr2, and individual characteristics of the land(is it well tiled, how large is the piece, is it nice and square or oddly shaped?) Honestly your best baseline would the ISU cash rents survey.
https://www.extension.iastate.edu/agdm/wholefarm/pdf/c2-10.pdf
Updated 2025 version should be out later this month. I would not anticipate big changes.
I'd lean against share cropping unless you have been or plan to in the future be heavily involved with farming. Just much more complexity there that can result in frustrations.