I can literally look out a window at my house and see her house. Very closeIf the child is responsible and willing to learn, it will be a good experience. And the child has had fish previously so she has some experience. I think her aunt will guide her after having done so much preparation and research. And if the aunt lives close by, she can visit often at least at first till her niece learns the proper way to maintain the tank and care for the fish.
PS: I don’t mean to sound stalker-y, rather that I’m nearby if there is an issue.