Lipo for 3 different Emaxxes

[krunk]

I want to convert to Lipo without breaking the bank.
Need Lipo/charger/balancer recommendations for my E's
Setup 1: stock
Setup 2: 1930/5 Lehner with a BK19150
Setup 3: Duel Hacker B8s / schulze 66ce

Option 1: 4S for the stock and the Lehner setup and (2) 3s for the Duel setup
Option 2: Sell the duel setup?
Option 3: ?

Is 4S too much for a Hacker B8S?