How about:
subs:
20th june (end 30th june)
20th august (end 30th august)
20th october (end 30th october)
Finals:
20th december (end 30th december)
so ten days of voting, then on the 30th declare a winner (Goes to the finals)
in december we have 3 finalists. the best man wins.
I think fame would be enough of a prize. No need to actually give stuff.