saw an ebay buy it now for a 18-55 VRII for 105 dollars with 1 year warranty, and then get the 85 mm. just right. For weddings, I like to use zooms, a 35-70 and a 80-200 both 2.8. The reason is flexibility, you can't be shifting back and forth all the time, that would be distracting, but you often want to vary the framing. So depending how far from the action will dictate which zoom to have on.
Also, investing in fast focus lens can make or break the event shoots. To have a slow lens hunting for focus can be a killer as a special moment passes, and that especially applies to sports.