Hello there. Hope you are doing good. I would like to tell you that any college or university has rules over hostel only. Staying in a PG is considered as a private accommodation that has nothing to do with college. So, yes you can definitely stay with your mom in a PG. You just have to search for a good accommodation which you can find online as well as by local search.

I hope you found this answer helpful. Goof luck for your future.