I'm one that sits on the sidelines, not much hobby time.
I think a template other than FPS would be good even a third person like Torchlight. You could show how to load from one world to another, inventory system, melee and ranged combat.
Tower derfense would also be good. A template would have to be pretty complete.
Not sure Kickstarter would suceed, Udemy might be the way to go. Getting it advertised on the main LW site would be good with Josh phelping promote it, though that would need agreements in place.
I do like the idea of paid templates and add-ons, TD template, inventory, ai. I have bought quite a few in the past.
Good luck with it.