The scenario that you describe there is in the series The Expanse.
There, humans have already advanced into space, terraforming Mars and setting up outposts in space, and one of those outposts is in the Astroide Belt, where a huge Astroid has been transformed into a station, just as you describe it. Only that they have not solved the problem of radiation and there are mutations ...
I hope we will solve this problems one day.
Really? I'll have to check it out...I've never heard of it. Too bad I hadn't thought of this post earlier. I could have sued somebody for stealing my idea! ;^)
lol :)))