Don't worry about making some big maps. a medium to small map is fine. Am all about the side content with the character and the secret animation more then the actual ghosts anyway
Side content depends on what location I'm using as the map. For example, Mayscape Apartments and village going to have plenty of NPC animations and secrets compare to other map which may have only one or none at all. Current map, I'm working on is will not have any NPC animation but you will find new TV channel and something that can be used in previous maps.