Based on my previous question, tried to understand why was Frodo living with Bilbo based on the assumption that it's not something normal. As Nathaniel pointed in a comment,
It could be perfectly normal for hobbits, as far as we know
So, this assumption was likely being drawn from my human experience. To clarify in case of any doubts, is that normal for hobbits or not?
By normal I mean that the majority would live that way. For instance, it could be considered normal in my hometown to have kids before marriage since 7 out of 10 newborns match that requirement (i know it's possible to judge "normality" based on other criterias (not necessarily through the majority) but that's not the intent here).