12 ft walls here, I could do a 6ft wide loft around the three walls for organizing my stuff, or more then likely our lamps and reto stuff my wife sells on line, her side behind Victoria, my side is the fun side lol.
Your trusses look the same, mine are 4' apart what are yours 6? Hard to tell in the pic. I also have osb on the walls. Beats the heck out of sheetrock when tou want to put something up.