1) Space for more activities. In the office space there are two teaching rooms, a bathroom, and a large waiting room area where I also have a desk area. I was able to incorporate three more teachers into the weekly schedule and really offer a school setting. We have a keyboard "lab" so we can offer group piano classes as well. Studio group classes, rehearsals, and vocal coaching are all possible too.
2) Parents/students feel more comfortable. I have noticed that parents with larger families are less stressed to bring in all their kids to wait for a lesson because there are no personal items of mine or other teachers that could be broken somehow :)
3) I really like not combining home with work. Everything stays behind at the studio, and I can just go home.