There have been several folks hear talk about wearing the sporran on the hip while going thru daily business so I don't think it would be unsightly, although I might would consider using a more simple sporran in this application. Maybe one of the Buzz Kidder Celtic not day sporrans. http://www.usakilts.com/sporrans.php

By the way, I commend you on the way you are incroporating the kilt into contemporary fashion. This is yet more evidence of how practical the kilt is a practical garment even today.