You know what I'd do if it wasn't too much work? Start a fantasy baseball dynasty league.  Along the lines of
this.Â
Start in first year with a draft to establish initial 40 man rosters, then drop however many you want prior to the next season and the next draft runs until everyone fills back up to 40.Â
You'd obviously want to start with everyone willing to commit long-term, but replacing owners would be pretty straightforward when needed.