I think we need to start with a 40K capacity stadium. It has to have a bowl feel with seating all the way around. I like the feel that if you're on the field you are surrounded by the crowd. I would rather have seats but I understand that for the price it would have to have number spots on bench seating.
Tulane has a OCS that cost $75M but only seats 30K. Trim a little of the luxury stuff they have and add 10K seats and we have a good start.