Well, I've now built my whole Chapter 18 race. 4 wind, 4 fire, 4 earth, and 3 water hubs, plus I kept 2 welcome centers just to boost up the human pop. (Seems like the portal profits fill the others to the brim while humans are still needed.) I think this is going to work out well ... I'll finish my first set of 25 badges today so I can upgrade residences later today (I don't have any ... just MRs, but I need that research). I'm not at all frustrated like I was with 17, and this feels like it takes a lot less space. Not sure I'm right ... maybe that's just because I'm happy with it, lol.
Thanks for everyone's help ... I'm very grateful.