I'm sure it'd be as weird as joining a human research club unless she doesn't really know much about her own species.
I thought she was gonna end up in some animal care club because she liked the chicken
Tbh why shouldn't Rei buy it, he's never needed a large space to live in and that excess space can be used for the shop. He's looking for a house anyway and if he and Hina move in together they'd want their own space right?