Why can’t I buy more tables for the restaurant?

I really hope that we'll be given more options to customize work areas in the future. Like I get that the amount of space can't be adjusted. But I'd love to change the wallpapers or carpets. Maybe even let us add walls. Cause I'd love to make changing rooms in my Fashion Studio. I know that the Wooden Dividers are a thing, but they kinda don't allow much privacy.