I think the Fischer Clock controls are reasonable, The default for that control: 7 days with 1 bonus day added for each move seems reasonable. At the limit case, each player gets 1 day per move + weekends. The two slowest players in a tournament would both have to make 100 moves in a game in a year (200 moves + 80 weekend days + 90 vacation days) = roughly one year. Perhaps it would be more weekend days once the vacation kicked in, but close enough. If you play large sections (7 or 8 players) you should finish in two rounds.