Just keep in mind, most spas have 5 or 6 seats, but they are not designed for 10 - 12 legs. Many don't have the freeboard design to keep water in the spa after the 4th person settles in the spa. Test soak if possible. DOn't let someone SELL you a five to six person just because it has five or six seats. Look at footwell for leg room, etc.
You better slow there Kyle you might be making to much sense for some .... like a spa with 7 seating positions being a 7 person ......NOT......most spas even those that are larger are still for 4 or 5 at the most ..... particularly with you consider clean water .....
