If you get there at 9:30, I'd be prepared to wait as long as an hour to get in. You won't likely be near the front of the line and there's a bottleneck of people entering when doors open at 10.
One option is to get VIP passes, and then you can walk right in at 9:30. If you're going to go VIP, it is really nice to get there in time to enjoy the expo before the crowds hit at 10 -- so, like at 8:30. Once I started buying a VIP pass for Tinley, I never get regular tickets anymore -- that hour or more before everyone else rolls in is worth $40 more, in my opinion.
Alternatively, consider going after lunch, there shouldn't be any line.