One-commands generator for Minecraft 1.12 [Tutorial included] - YouTube
Gamer Geeks - New Minecraft Tool Time! /Team Command Generator https://buff.ly/3kkUskj It should help with typing all those commands, just enter team name and display name and you're good to go! Also
City Generator - One Command Creations
Minecraft: Castle Generator in only one command! (1.8) - YouTube