Another thing I feel is important to mention about trying to make too big of a team is recruiting people online to help you - people will start out very interested, but for various reasons (conflicting schedules, creative differences, general disinterest) a lot of them will bail; I've seen this take place in countless mods and small OSS projects. So along with advising small projects it's also a good idea to work with people who you know will be dedicated - usually yourself