Though m not playing the game, here are my few cents :). From logistic point of view it will be double cost for us to play semifinal on saturday and then final(if we qualify) on sunday. Other problem would be the players availability. We have played bwcv 40 over final in consecutive days and I think won't be a problem if we have to play two t20 games on the same day.
Just to entertain Waheed :), we may ask him to come for semi finals here in Kaiserslautern, if indeed he wants to play it on saturday citing players availability and transport cost as the reason. How is that?:)
Best Regards,
Asif