QCB is 25k capacity and one end is a double tier and the north a single. The best bet for penrith is to do a single tier at each end, and then roll the extra seats required for the 25k into the east and west stands, would probably only require about 10-12 extra rows on top of those seen at QCB.
The ends at penrith would have to be purely seating and not much in the way of concessions as there is not a lot of real estate to have both.
The pic below is for reference as the south end of QCB has a few bars and eateries and a team store.
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