>My question: Is there enough room to put 5 frames on each side?
With a 1/4" divider, yes, but it's tight.
> Or are you limited to 4 frames on each side that leaves enough room for the bees to get on top of the frames and have access to feeding syrup?
How are you going to feed syrup without them getting to the other side? Not saying it can't be done, but I'm not sure I understand your question. Of course you can build a division feeder and then do four on each side.