Here is a 30 team NCAAB league for you: Duke, UNC, FSU, Cuse, Louisville, Virginia, Notre Dame, Oklahoma, Oklahoma State, Texas, Kansas, Michigan, Michigan State, Ohio State, Wisconsin, Indiana, Maryland, Purdue, Villanova, Uconn, Oregon, Stanford, Arizona, UCLA, USC, Kentucky, Florida, LSU, Tennessee, Gonzaga.
The remaining teams, being they would be excluded from a playoff that includes those teams, present an obstacle because? I think a cogent 30 team college basketball league is easier to put together than a 30 team college football league.