Sounds like a fun idea to build the town by group decisions. Also, I'm glad you liked the map. I tried to balance a good flow and symmetry for major landmarks.
Are you going have everyone vote on a theme for the town as well? Because some of the possible PWP are better suited to some type of themes. I did leave a large area open for decorative PWPs will be interesting to see how it can be built up depending on how people vote. For example it could be a park for a rural themed town (Tire Toy, Jungle Gym, Jungle Gym, Drinking Fountain, and Picnic Blanket), plaza for a modern themed town (Tower, Video Screen, Illuminated PWPs, Modern Benchs), or a desert and oasis for an African themed town ( Pyramid, Sphinx, Hot Spring, Log Bench).