Waiting for new settlers takes a long time. Even with the schools it's way too slow, one of the quests in the Fallen Army event proves my point. I figured, why not increase the speed that settlers are made if you upgrade your mayorhouse? For example:
Level 1 - 1 Settler / 15 min.
Level 2 - 1 Settler / 12 min.
Level 3 - 1 Settler / 10 min.
Level 4 - 1 Settler / 8 min.
Level 5 - 1 Settler / 5 min.
Let's assume you want to make an army of 2,5K. When you got 3 schools it still takes you almost 19 days, without even 26! In my plan it "only" takes you (if you MH is lev 5) 8.7 days, which is still long but a lot better...
I know you can use bread but I rather use bread to make buffs.