It'll help you more than gemming certain upgrades in the long run
5th builder starts to get not that necessary only at the end of th10, where im at.. And i have only four builders lol, now is the only time where i didnt need all 5, no elixir upgrade left, heroes high level and nearly all defenses maxed
I personally think that 5 builders are key because sooner or later you are gonna have all those builders building and it's worth it then trust me..and if your serious about this game why not 25 dollars is a small investment compared to what supercell did to bring you this game.
Good to hear a majority of you think I made a good investment ;)
Just wish I would have spent that $20 when I was down at TH4 or even 5 haha