Personally I love to 25 man.. but I know that would just be really hard to do without showing people progression. Though 10 man would not be so bad. It would just take a group of people that have interest in being loyal, goal oriented, and willing to be patient to pull it off.
If you are interested in this let me know. Shoot me a tell on Agilit, post here, or email me at - Markcal31@hotmail.com