5 or more families split the price of a Memory Maker. So instead of $150, you could pay $30. Check out the Facebook group: Walt Disney World Photopass Share. Also, someone there posted this link which was very helpful:
http://dopeyrunr.blogspot.de/2014/06/memory-maker-share-guide-for.html?m=1
I've done several Photopass shares and led a Photopass+ share. Memory Maker share is new to me but I think there's only a few small changes primarily surrounding Magic Bands and
MDE.